InstaCuppa guide: how to use an electric rice cooker for the first time, with water level lines in the pot, the small 180 ml rice cup and a 250 ml jug

How to Use an Electric Rice Cooker for the First Time

By Saran Reddy, Founder — InstaCuppa | Published 19 June 2026 | 12 min read | Last updated: 30 October 2026

Some links here are affiliate links. If you buy through them we may earn a small commission at no extra cost to you. We only point to products we would suggest to our own family.

InstaCuppa guide: open electric rice cooker with water level lines in the pot, the small 180 ml rice cup and a larger 250 ml measuring jug beside it

How to Use a Rice Cooker: The Short Answer

Measure the rice with the small cup that came in the box. Wash it in a separate bowl. Tip it into the inner pot, pour water up to the line with the same number, close the lid and press Cook. When it is done, fluff the rice: right away on a cooker that beeps, or after about 15 minutes on a simple switch cooker.

Two things trip up almost every first-time user. The cup in the box is not a normal kitchen cup. And you never measure the water — the pot has lines for that. Both are covered below.

Using a new electric rice cooker for the first time? Wash the inner pot and lid before you cook. If it smells of plastic, run one cycle of plain water. The steps are in How to Use an Electric Cooker for the First Time.

That Little Cup Is 180 ml, Not 240 ml

The plastic cup packed with a rice cooker holds about 180 ml. A US cup is 240 ml and a metric cup is 250 ml. So it is roughly three-quarters the size of the cup in your baking set.

This is not one brand being odd. It is the standard across the category. Zojirushi prints "1 Cup = approx. 180 mL" in its manual. Toshiba writes "A level cup = 180ml" in its. Tiger says a level fill of the supplied cup "equals about 0.18 L".

Why it matters: the water lines inside the pot are drawn for that 180 ml cup. Measure your rice with a bigger cup and every line is wrong, so the rice comes out hard. Zojirushi puts it straight — use the cup provided, because other cups may differ, and level the rice off flat at the top.

Lost the cup? Measure out 180 ml of water in a jug, pour it into a mug, and mark the level. That mug is now your rice cup.

How to Use a Rice Cooker Step by Step

Here are the rice cooker instructions in 7 steps. They work for a big or a mini electric rice cooker, and they follow the Zojirushi, Tiger and Toshiba manuals listed at the end.

  1. Measure the rice with the cup from the box. Overfill it, then scrape it level at the top.
  2. Wash the rice in a separate bowl — never in the inner pot. Use cold water and work quickly.
  3. Drain it well and tip the wet rice into the inner pot. Spread it flat.
  4. Add water up to the matching line. Two cups of rice means line 2. Stand the pot on a flat surface while you check.
  5. Wipe the outside of the pot dry, sit it in the cooker, close the lid, plug it in and press Cook. On a simple cooker, press the switch down until it clicks.
  6. When it is done, fluff the rice. If it beeps, open it and fluff straight away. If its switch clicks up to Warm, keep the lid shut about 15 minutes first. Cut through the rice with the flat spoon and lift it gently.
  7. Serve, then switch keep warm off once everyone has eaten.

Water: Use the Line, Not a Ratio

Rice cooker manuals do not give you a rice-to-water ratio. They tell you to fill to a line inside the pot. The lines are already worked out for the cup you were given.

Tiger's manual shows it with an example: when you cook 3 cups of white rice, adjust the water level to line "3" of the scale on the inside of the pot. Zojirushi says to pour the water on a flat, level surface and fill to the Water Level Line.

You are still allowed a preference. Zojirushi calls the line a standard guideline and says to adjust 1-2 mm above or below it to suit your taste, the type of rice, and how old the crop is. So if your rice is a shade too firm, go 1-2 mm over the line next time. Too soft, go under. Change one thing at a time.

Most pots carry more than one scale — one set of lines for plain white rice, another for congee or porridge. Read the small label next to the numbers before you pour.

How to Wash the Rice (and Where)

Wash the rice in a separate bowl, in cold water, and get it over with quickly. Both halves of that sentence matter.

Tiger spells out the reason for the bowl: washing rice in the inner pot can damage the non-stick coating or deform the base of the pot, and a bent base cooks rice unevenly from then on. That pot is the expensive part of the machine.

Toshiba covers the water: do not wash rice with hot water, and do not wash rice for a long time, because slow or hot washing leaves the rice smelling of bran. Zojirushi is stricter still — it warns against using water at 35°C or above for washing or for topping up, saying it makes the rice cook badly.

Zojirushi's own method is a good template. Pour in plenty of water, swirl the rice by hand two or three times for under ten seconds, drain at once, and repeat. Then wash by stirring about thirty times, roughly fifteen seconds, and drain. Rinse twice more. The whole job should be done inside ten minutes.

When to Open the Lid: Beep Cookers vs Switch Cookers

On a digital cooker that beeps, fluff the rice the moment it is done. On a simple switch cooker, keep the lid shut about 15 minutes after the switch clicks to Warm, then fluff. The two kinds of cooker finish in different ways, and their manuals say so.

Zojirushi's cooking steps say that when the melody or beep sounds, stir and loosen the rice immediately. The manual explains why: stirring lets excess moisture escape, which stops the rice hardening, going soggy, or burning at the bottom. If you cannot get to it that second, you have a window — loosen the rice within 10 minutes, or it clumps and turns gluey.

On a cooker like this, the resting you have read about is real, but the machine already did it. Zojirushi describes a steaming stage that runs near the end of the cycle, before the cooker announces it is finished. By the time you hear the beep, the rest is over.

A tip from the same manual: split the rice into four quarters with the spoon and loosen each quarter on its own. It is faster than stirring the whole pot and you do not mash the grains.

A simple switch cooker works the other way. Tiger's JNP-G has one switch button. Its manual says that when the switch turns off and Keep Warm starts, the rice is still steaming. So keep the lid closed for about 15 minutes, then stir and loosen the rice. If your cooker has one switch and a Warm light, follow this rule. If it beeps and shows the time left, follow the beep rule above.

How Long Keep Warm Is Safe

Keep warm is for a meal, not for the day. Zojirushi lists 12 hours or more on regular keep warm as a cause of dry, wet, smelly or yellow rice.

The same warning list is worth knowing in full. Zojirushi says not to use keep warm for:

  • Keeping a small amount of rice warm for a long stretch
  • 12 hours or more on regular keep warm, or 24 hours or more on extended keep warm
  • Adding fresh rice on top of rice that is already being kept warm
  • Reheating rice that has gone cold
  • Keeping congee or porridge warm

Leftovers belong in the fridge in a closed box, not in the cooker overnight.

How to Use an Electric Cooker for the First Time

To use a new electric cooker for the first time, wash the removable parts and dry them. Expect a faint plastic smell at first. If it bothers you, run one cycle of plain water, then cook rice as normal.

Toshiba's manual tells first-time users to wash the inner pot, the inner lid, the steam port and the other accessories before using the cooker. It also says there may be an odour from plastic on first use, and that the smell disappears with use. Zojirushi simply says to clean the rice cooker and the area around it before you use it.

Toshiba also tells you how to clear that smell: clean it by boiling. Pour water up to line 1 for white rice and close the lid. Choose White Rice and press Cook. When it switches to Keep Warm, turn it off. Once it cools, wash and dry the inner pot, the inner lid and the steam port. Put in only water, no soap. Zojirushi's NL-BGQ05 gives the same fix for any smell: water up to line 1 for white rice, no soap, and a Quick Cooking cycle.

Other electric cookers follow the same idea. The product page of our own InstaCuppa Multipurpose Electric Kettle Cum Cooker says to wash the removable parts, fill it with water to the maximum mark, boil it once and throw that water away before the first use.

One rule is absolute across every manual we read: never put the main body in water. Zojirushi, Tiger and Toshiba all carry the same line — do not immerse the rice cooker. Wipe the outside with a damp cloth instead, and keep the cord and plug dry.

How to Turn On a Rice Cooker (Cook and Warm Switch)

Plug it in, then press the switch down until it clicks. On Tiger's JNP-G, the click means cooking has started, and the Start lamp turns on. When the rice is done, the switch turns off by itself and the Keep Warm lamp takes over. Tiger says not to press the switch for cooking while Keep Warm is on.

Tiger adds one more tip. The warming part runs any time the cooker is plugged in but not set to cook. So plug it in only when you are ready, and unplug it when you are done. A digital cooker uses buttons instead. On the Zojirushi NW-QAQ, you plug it in, pick the menu and press START/REHEAT. Its light turns on, and the screen shows the time left.

How to Use a Mini Rice Cooker

A mini rice cooker works the same way: use the cup from the box, fill water to the line and press Cook. The main change is the amount. Tiger's 1 litre JNP-1000 cooks 1 to 5.5 cups, but its 1.8 litre model needs at least 3 cups. So check the smallest and largest amount in your manual before you cook. For a hostel room or a small flat, see our Best Mini Cookers for Indian Bachelors guide.

Basmati and Indian Rice

Basmati is a long-grain rice, and better cookers give long grain its own setting.

Zojirushi's NL-BGQ05 lists a LONG GRAIN menu for long-grain white rice and adds an honest note — depending on the brand of rice, the result may come out slightly harder than normal. That is useful to know before you blame yourself.

If your cooker has a single Cook button, which most budget Indian models do, use the white-rice line. Cook one batch as the line says, taste it, then move the water 1-2 mm up or down next time. Two batches and you will have your household's setting.

Shopping for the machine itself? Our Best Electric Rice Cooker in India 2026 guide covers what to look for, and 15 Things to Cook in a Rice Cooker is where to go once plain rice feels easy.

Browse Rice Cookers on Amazon India

Cooking for one or two?

A full rice cooker can be more machine than a hostel room or a small flat needs. The InstaCuppa Portable Multi Cook Electric Kettle has a 1 L non-stick inner pot, 450 watts and dry-boil protection. It is made for small jobs like tea, coffee and boiled eggs. For bigger batches, with a momo steamer and idli trays, there is the 1.2 L, 600 watt InstaCuppa Multipurpose Electric Kettle Cum Cooker.

These are our own products. We do not sell rice cookers, so the rice cooker link above goes to Amazon.

Common Beginner Mistakes to Avoid

Mistake What happens Do this instead
Measuring rice with a normal 240 ml kitchen cup Every water line in the pot is now wrong, so the rice cooks hard Use the 180 ml cup from the box, levelled off flat
Washing the rice in the inner pot Tiger warns it can damage the coating or deform the base Wash in a separate bowl, then tip the rice in
Washing slowly, or in hot water Toshiba says it leaves a bran smell in the rice Cold water, quick swirls, done inside ten minutes
Leaving the lid shut long after a digital cooker beeps Rice clumps, turns gluey, or catches at the bottom Open and loosen it straight away, within 10 minutes
Checking the water level on a tilted counter The line reads high on one side, so the water is off Stand the pot on a flat surface before you pour
Holding rice on keep warm all day Zojirushi links 12 hours or more to dry, smelly or yellow rice Fridge it in a closed box once the meal is over
Starting a second batch straight away A hot body and lid can make the cook run up to about an hour longer Let it cool about 45 minutes, or cool the pot with cold water

That last one surprises people. Zojirushi says to let the cooker cool for 45 minutes or longer before a second pot, or before cooking right after you cancel keep warm. A hot body and outer lid can stop the rice cooking properly, and can stretch the cycle by up to about 60 minutes. In a hurry? The manual suggests filling the inner pot with cold water and sitting it in the body, or opening the lid to let the plate cool.

Weighing a rice cooker against the pot you already own? Best Pressure Cooker in India 2026 and Slow Cooker vs Pressure Cooker in India both help. Cooking in a hostel room instead, read Mini Electric Cooker for Hostel, and for trains and hotels there is Portable Cooker for Travel India.

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Frequently Asked Questions

How do you use a rice cooker for the first time?

Wash the inner pot, the inner lid, the steam vent and the spoon in warm soapy water, then dry them. Toshiba tells first-time users to do exactly this. A faint plastic smell on the first cook is normal and goes away. Never put the main body in water. Then measure your rice with the cup from the box, wash it in a separate bowl, add water up to the matching line, and press Cook.

How much water do I put in a rice cooker?

You do not measure it. Put the washed rice in the pot, stand the pot on a flat surface, and pour water up to the line that matches your number of cups. Tiger puts it plainly: for 3 cups of white rice, fill to line 3. Zojirushi calls the line a guideline and says you can move 1-2 mm up or down to suit your taste.

Should I wash rice before putting it in the rice cooker?

Yes, and wash it in a separate bowl, not in the inner pot. Tiger warns that washing rice in the pot can damage the non-stick coating or bend the base, which then cooks rice badly. Use cold water and be quick. Toshiba says not to wash rice with hot water or for a long time, because that gives the rice a bran smell.

Should I let the rice rest before I open the lid?

It depends on your cooker. On a digital cooker that beeps, no. Zojirushi's manual says to stir and loosen the rice immediately when the cooking-complete signal sounds, and within 10 minutes at the latest. Leaving it shut makes the rice clump, turn gluey or catch at the bottom. On a simple switch cooker, yes. Tiger's JNP-G says the rice is still steaming when the switch clicks to Keep Warm, so keep the lid closed about 15 minutes, then loosen it.

How long can rice stay on keep warm?

Under 12 hours. Zojirushi lists keeping rice warm for 12 hours or more as a cause of dry, wet, smelly or yellow rice. The same list warns against keeping a very small amount warm for a long time, adding fresh rice to rice already on warm, and using warm to reheat cold rice.

Can I cook basmati in a rice cooker?

Yes. Basmati is a long-grain rice. Zojirushi's NL-BGQ05 has a separate LONG GRAIN setting for it and notes that, depending on the brand of rice, the result can come out a little firmer than usual. If your cooker has only one Cook button, use the white-rice line and nudge the water 1-2 mm higher next time if the grains feel hard.

Rice cooker mein kitna paani dalna chahiye?

Paani napne ki zaroorat nahi hai. (You do not need to measure the water.) Dhule hue chawal pot mein daaliye aur utni hi line tak paani bhariye jitne cup chawal aapne daale hain. 2 cup chawal ka matlab line 2. Zyada ya kam pasand ho to line se 1-2 mm upar-neeche kar sakte hain.

How do I turn on a rice cooker?

Plug it in, then press the Cook switch down until it clicks. On Tiger's JNP-G, the Start lamp turns on to show it is cooking. When the rice is done, the switch turns off by itself and the Keep Warm lamp comes on. A digital cooker has buttons instead: pick the menu and press Start.

Why does my new rice cooker smell of plastic?

A faint plastic smell is normal on a new cooker, and Toshiba says it goes away with use. To clear it sooner, Toshiba says to clean it by boiling. Fill water to line 1 for white rice, run a White Rice cook, and turn it off at Keep Warm. Once it cools, wash and dry the parts. Use only water, no soap.

Rice cooker kaise use karte hain?

Box wale cup se chawal napiye aur alag bowl mein dhoiye. Chawal pot mein daaliye aur utne number ki line tak paani bhariye. Dhakkan band karke Cook switch dabaiye. Pakne ke baad chawal ko halke se mila dijiye. (Measure the rice with the cup, wash it, fill water to the line, press Cook, then fluff.)

What else can I make in a rice cooker? (Rice cooker me kya kya bana sakte hain?)

Many cookers do more than plain rice. Zojirushi's NW-QAQ, for example, has water lines for congee and comes with a steaming basket. Check the menus and lines in your own manual. For ideas, read 15 Things to Cook in a Rice Cooker.

Sources & References

  1. Zojirushi NW-QAQ Rice Cooker Instruction Manual — Zojirushi (180 ml cup, water level line, wash method, loosen immediately, 12-hour keep-warm limit, 45-minute cool-down, START/REHEAT button, congee lines and steaming basket)
  2. Zojirushi NL-BGQ05 Rice Cooker Instruction Manual — Zojirushi (180 ml cup, LONG GRAIN setting, loosen after cooking, keep-warm limit, odour fix: water to line 1, Quick Cooking)
  3. Tiger JNP-G Rice Cooker / Warmer Instruction Manual — Tiger Corporation (0.18 L cup, water level line example, wash in a separate bowl, do not immerse, switch button and Start lamp, keep the lid closed about 15 minutes after the switch turns off, JNP-1000 cooks 1 to 5.5 cups)
  4. Toshiba RC-10/18NAFI Rice Cooker Instruction Manual — Toshiba Lifestyle (180 ml cup, no hot water and no slow washing, clean parts before first use, first-use plastic odour, cleaning by boiling)
  5. InstaCuppa Multipurpose Electric Kettle Cum Cooker product page — InstaCuppa (first use: fill to the maximum mark, boil once, discard the water; 1.2 L, 600 W)
Saran Reddy

Founder, InstaCuppa. I test home and kitchen tools in my own home in Tirupati and write about what actually works for busy Indian families.

The kitchen takes your mornings, afternoons, and evenings. Your family gets what's left.

InstaCuppa builds time-saving kitchen tools for busy Indian families — so the kitchen stops stealing the moments you can't get back.

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