Katori Calculator: Convert to mL, Cups and Grams
This katori calculator turns your own katori, glass or spoon into millilitres, cups and spoons. Measure it once with a jug, then convert any number of katoris.
Calibrate and convert your katori
1. Measure your katori (example shown; replace it with your own measurement)
Fill the katori the way you serve it, pour the water into a measuring jug and read it. Katoris differ, so no size is assumed.
2. Convert katoris to standard measures
Values are rounded for display. The copied text uses the same rounding.
3. Foods you have weighed (example weights shown; replace them with your own)
Weigh one level katori of the food on a kitchen scale and type the grams. A weight is only used for foods where you enter one.
4. Compare with a glass or spoon (example shown; replace with your own)
Measure each vessel in mL the same way, then see how many katoris it equals.
How do I measure my own katori?
Fill your katori with water to the level you normally serve, pour it into a measuring jug and read the millilitres. That takes about two minutes and is the only number the katori calculator needs for volume.
- Fill to your usual level, not to the brim, unless you serve it brim full.
- Read the jug at eye level on a flat surface.
- Repeat once. If the two readings differ, use the average.
- Do the same for a glass or a serving spoon you use often.
How the katori calculator works
The tool multiplies the number of katoris by the volume you measured, then converts millilitres to the other units with exact definitions: a metric cup is 250 mL, a metric tablespoon 15 mL, a metric teaspoon 5 mL and a US cup about 236.6 mL.
millilitres = katoris × mL per katori
grams = katoris × grams in one level katori of that food
katoris = grams ÷ grams in one level katori of that food
The grams in a katori are never worked out from the volume. Different foods pack differently, so weight and volume cannot be swapped without weighing. The tool uses a weight only for a food where you typed one.
Worked example: 2 katoris of 150 mL
These are example numbers. Replace them with your own katori and your own weights.
| Quantity | Result |
|---|---|
| 2 katoris at 150 mL | 300 mL |
| Litres | 0.3 L |
| Metric cups (250 mL) | 1.2 cups |
| US cups | 1.27 cups |
| Metric tablespoons / teaspoons | 20 tbsp / 60 tsp |
| Cooked rice at a measured 120 g per katori | 2 katoris = 240 g |
| 360 g of that rice | 3 katoris |
| 3 glasses of 250 mL | 750 mL = 5 katoris |
Why do katori sizes differ?
No standard katori exists, so the name covers bowls, tumblers and cups of many shapes, and each home also fills them differently. One household’s katori of dal can be noticeably more or less than another’s. That is why recipes that say “1 katori” are best treated as your own katori, and why measuring beats guessing.
Katori or cup: which is more accurate?
A measuring cup is more consistent because its size is defined, but a katori you have calibrated is just as repeatable in your own kitchen. Convert a recipe once and note it down, for example “1 katori = 150 mL = 0.6 cup”. To change quantities in a recipe, use the recipe scaler, and for other kitchen units try the kitchen unit converter.
Tips and limits
- Rounded or heaped katoris hold more than level ones. Measure the way you serve.
- Weights are for cooked or raw food exactly as you weighed it. A weight for cooked rice does not apply to dry rice.
- To cost a recipe once you know the grams, use the recipe cost calculator. For the calories in a roti or other staples, read our guide to roti calories and nutrition.
- This tool converts only what you measured. It gives no portion advice or calorie target.
Once your katori is measured, the katori calculator keeps every conversion in your own kitchen units.
Frequently Asked Questions
There is no fixed size. Katoris sold in shops range widely, so the only reliable answer is the one you measure. Fill your katori to the level you normally serve, pour the water into a measuring jug and read the millilitres. If yours holds 150 mL, 1 katori is 150 mL, 0.15 litres, 0.6 metric cups and 10 tablespoons.
It depends on your katori. A metric cup is 250 mL, so divide 250 by the volume of your katori. A 150 mL katori gives 1.67 katoris per cup. A US cup is about 236.6 mL, which is 1.58 of those katoris. Measure your own katori first, then the katori calculator does the division for any number of katoris.
It depends on the food, how it is cooked and how full the katori is, so no single figure is right. Weigh one level katori of your cooked rice or dal on a kitchen scale and enter it in the food row. In the example, a katori of cooked rice weighs 120 g, so 2 katoris are 240 g.
Yes, if you measure each one. Fill the glass or spoon to the level you use and enter its millilitres in a vessel row. The calculator then compares the volumes. A 250 mL glass and a 150 mL katori give 3 glasses = 750 mL = 5 katoris. It converts volume only, never weight.
Because bowls, glasses and spoons sold under the same name differ from home to home, and so does how full people fill them. A made-up standard would make every recipe and portion look more exact than it is. Measuring your own katori takes about two minutes and keeps the conversions true for your kitchen.