Exact unit, cooking, fuel, data-size, duration, number and base conversions, plus heat index and wind chill.
payments ON MAINNET (real money) · 9 live endpoints
| Endpoint | Price | What it answers |
|---|---|---|
GET /base-convert | $0.02 | Convert a number between bases 2 to 36 exactly (binary, octal, decimal, hex), with big-integer precision. |
GET /cooking-convert | $0.02 | Convert cooking measures: cups, tablespoons, teaspoons, ml, ounces and grams, with weight for flour, sugar, butter and more. |
GET /data-size | $0.02 | Convert data sizes between bytes, KB/MB/GB/TB (decimal) and KiB/MiB/GiB/TiB (binary), and the time to transfer at a speed. |
GET /duration-format | $0.02 | Turn seconds into a readable duration (2 h 5 min) or parse one like '1d 3h 20m' back into seconds, minutes and hours. |
GET /feels-like | $0.02 | Apparent temperature: heat index from temperature and humidity, wind chill from temperature and wind, with a danger category. |
GET /fuel-economy | $0.02 | Convert fuel economy between US mpg, UK mpg, km per litre and litres per 100 km, with optional trip fuel and cost. |
GET /number-words | $0.02 | Write a whole number in English words (cardinal and ordinal) and as a check-writing amount in dollars and cents. |
GET /roman-numerals | $0.02 | Convert between integers (1-3999) and Roman numerals, and check whether a Roman numeral is written in canonical form. |
GET /unit-convert | $0.02 | Convert a value between units of length, mass, volume, area, speed, pressure, energy, power, time or temperature, exactly. |
GET /catalog returns this list as JSON. Activity hub · uptime.
Conversions are computed locally from the numbers you supply using standard definitions, provided as is. Cooking weights are typical averages that vary by brand and packing. Heat index and wind chill use the US National Weather Service formulas and are guidance, not safety advice. Every paid response carries a disclaimer field.