Everyday calculators
The calculators on Nouplo for everyday sums in one place: money and prices, dates and time, the home and the kitchen, and units and sizes. Each works as you type, in your browser, with nothing to sign up for.
Money, prices and loans
％ Percentage and discount calculator Discounts, markups, shares and changes, typed the way you would say them. ％ Discount calculator Percent off → the price you pay and what you save. ¤ Tip calculator The tip, the total and each person’s share in one go. ¥ Split the bill Shares that actually add up to the bill. % VAT calculator VAT added or taken out, for one price or a whole list. ¤ Currency converter Today’s reference rates, any pair of 30 currencies. ¥ Loan repayment calculator The payment, and where it actually goes. ¥ Mortgage calculator From the price of the home to the monthly payment. ⤴ Compound interest calculator What a lump sum and a monthly deposit grow to, year by year. ‰ Late payment interest calculator Statutory interest on an unpaid invoice, period by period. 日 Prorated rent calculator Part-month rent or pay, worked out line by line, the way your lease or contract counts days.
Dates and time
▤ Date calculator Days between two dates, or the date 100 days on — business days too. ▤ Business days calculator Working days between two dates, holidays taken out and shown. ◴ Time calculator Hours and minutes added up, line by line, with a total in decimal hours. 歳 Age calculator Years, months and days, the next birthday and the zodiac year, for as many dates as you paste. ▤ Months to years 30 months is 2 years and 6 months, and back again. 暦 Japanese era converter 平成2年 ⇄ 1990, R5.4.1 ⇄ 1 April 2023 — with the day the era changed in the years it did. 学 Japanese school years calculator From a date of birth to every school's April entry and March graduation, in Western and era years.
Home and kitchen
⊞ Paint calculator Room size in, litres or gallons and tins out. ⊞ Tile calculator Area and tile size in, tiles and boxes out. ⊞ Wallpaper calculator Walls, roll and repeat in, strips and rolls out. ⊞ Flooring calculator Room size in, packs, underlay and trim out. ⊞ Concrete calculator Size in, volume and bags out. ⚖ Recipe scaler The same recipe for more people or fewer. ⚖ Cups to grams converter Cups and spoons in, grams out — ingredient by ingredient. ⚖ Cake pan size converter The recipe’s pan in, your pan in, the amounts out. ℓ Fuel cost calculator Distance, mileage and price in; the trip’s gas cost out. ϟ Electricity cost calculator Watts and hours in, kWh and cost per day, month and year out.
Units, sizes and distances
─ Unit converter Write it how you would say it. ㎡ Tsubo, m² and tatami converter Japanese floor areas made clear: tsubo, jō and m², with totals and the price per tsubo. ％ Rule of three calculator Three values in, the fourth out — with the working shown. ⊡ Shoe size converter Your size in every country — or from your foot length. ⊡ Clothing size converter Dress, suit and shirt sizes across countries. ◯ Ring size Measure a ring on your screen — or your finger — and get every size. ⊙ Distance between cities As the crow flies — with direction and flight time.
Frequently asked questions
- Is what I type sent anywhere?
- No. The sums are worked out in your browser as you type, so prices, salaries and dates stay on your device. The currency converter fetches the day’s exchange rates and nothing else.
- Can I rely on the results?
- The sums themselves are reliable; what matters is the input. A loan page shows a plan from the rate you enter, which your lender may round differently, and a paint or tile estimate is worth rounding up for waste and breakage.
- Where do the currency rates come from?
- From the European Central Bank’s reference rates, published every working day. They are mid-market rates for information: a bank or card adds its own margin.
- Is it free?
- Yes, with no account and nothing to install.