Measure, convert and cost anything.Life comes in all sizes.
Make sense of yours.
From a cup of flour to your next home project. One place for the numbers that matter.
Ask anything: units, sizes, paint for a room, what an appliance costs to run, pace, time zones.
Type something like 3 cups flour in grams and Tantoo answers straight away. If you prefer the classic picker, choose a category and set the units by hand. Length, weight, volume, temperature, speed, area, time and data are all here, along with the more unusual ones. Say a recipe asks for 180C and your oven is in Fahrenheit: enter it and the answer appears at the top.
Worked examples
- 5 ft 10 in in cm
- 177.8 cm
- 60 mph in km/h
- 96.6 km/h
- 350 °F in °C
- 176.7 °C, so set the oven to 180 °C
- 2 gallons in litres
- 7.6 litres for US gallons, 9.1 litres for UK gallons
Common questions
Can I type the conversion the way I would say it?
Yes. Type "3 cups flour in grams", "5 ft 10 in cm" or "20 kg in stone" and the answer appears straight away. Spelling slips and commas as decimal points are understood.
Why are there two answers for gallons and pints?
The US and the UK use different gallons and pints. A US gallon is 3.785 litres and a UK gallon 4.546 litres, so Tantoo shows both when it can't tell which you mean.
How accurate are the results?
Unit definitions are exact where an exact definition exists, such as the inch at 2.54 cm. Results are rounded for reading, and cooking conversions use sourced ingredient weights.
Sizes across countries
Compare clothing, shoe, ring and hat sizes across UK, US, EU and other systems.
Work from a measurement wherever you can, rather than guessing from a label. Enter a chest, foot length, finger or head measurement and see where it falls in each system, for women, men and children. Brands vary by up to a full size, so measure when it matters. If you are buying boots from a US shop, measure your foot in centimetres first and compare.
Brands vary by up to a full size. Measure when it matters.
Full chart
Family size card
Saved on this device only. Share it as a link; whoever opens it sees every size in their own country's system.
Cook from any country's recipe
Translate recipes between countries and sort out cups, grams, oven settings and tin sizes.
The recipe translator moves a method between countries, so American cups become grams and gas marks become degrees. You can also check roast times, compare tin sizes, and find the best buy by price per unit. Say a loaf recipe calls for a 9 by 5 inch tin and you own a 2lb one: check here before you start, and scale the mixture if needed.
Guide: cups to grams · Guide: oven temperatures · Guide: baking tin sizes · Guide: American recipes in a British kitchen
Enter any multiplier greater than 0, such as 3, 10 or 2.5.
Enter a number greater than 0.
Measures, ingredient names, oven settings and tin sizes are converted. Method text stays in the original language.
Egg sizes are changed to match: a US large egg is about the same as a UK or European medium.
Same batter, same depth: a round tin holds about 79% of a square tin of the same width.
Compare the same product in different pack sizes. Tantoo works out the price per kilo or litre and shows the best value.
Times are estimates for thawed, unstuffed meat. Always check the centre with a food thermometer: poultry 74 °C; whole beef, lamb or pork 63 °C and rest at least 3 minutes. Do not use a time estimate as proof of safety.
Tell us the job, we tell you exactly what to buy
Work out how much material a job needs, and build a shopping list to take to the shop.
Give the room or area and Tantoo works out quantities for paint, wallpaper, flooring, tiles, plasterboard, concrete, gravel, decking, fencing, bricks or skirting. Add a little for waste and cuts, then save the result to your list. For a bedroom you are repainting, enter the wall measurements and the number of coats, and you get the litres needed plus the tins to buy.
My projects
Shopping list
What it really costs to run, where you live
See what an appliance costs to run, using your own price per kWh.
Enter the power rating, how long it runs and the unit price from your bill, and you get a cost per use, per week and per year. You can compare two appliances, add up a whole home, or look at showers, standby and time-of-use tariffs. For example, put in your tumble dryer and the hours it runs each week to see the gap.
Add your price once and every energy tool uses it.
Travel card
A single card for the country you are going to, with the practical details in one place.
Pick a destination and you get plugs and voltage, which side they drive on, speed limits, how fuel is sold, the money and emergency numbers. It is the set of things you look up the night before and then forget. Driving in France from the UK, for instance, you can check the motorway limit and whether fuel is priced by the litre.
Check both the plug fit and the voltage range on your device label. An adapter changes the plug fit, not the voltage.
My Home
Everything you have saved in Tantoo. It stays on this device; nothing is uploaded.
Saved details stay on the device you used, so nothing here is held by us. Keep your room measurements, the appliances you check often, the conversions you return to, and your shopping list. You can export the lot as a file, or delete it in one go. If you measured a hallway last month, it is still here when you come back to buy flooring.
Favourites
Save conversions, recipes, appliances, trips and projects with the star. Reopen them here with your details ready.
Tantoo on your phone
The same tools as this site, with voice, widgets and offline use. Coming to iPhone, iPad and Android.
Put a Tantoo widget on your site
Free for recipe blogs, DIY sites and shops. Pick a widget, copy the code and paste it into your page.
Link your recipe or productOpen Tantoo with your ingredients or product details already filled in.
The widget works in your visitors' language and links back to Tantoo. The embed addresses go live with the website.