Unit converter

Length, mass, volume, temperature, data and speed, with the arithmetic done exactly.

Convert between units now No key, no code — 1 credit either way.

curl -X POST "$DOATHING_API/v1/core/unit-convert" \
  -H "x-api-key: $DOATHING_KEY" \
  -H "content-type: application/json" \
  -d '{"value": 100, "from": "c", "to": "f"}'

Length, mass, volume, temperature, data and speed, with the arithmetic done exactly.

Convert values between length, mass, volume, temperature, data-size, speed and time units.

Response

The result carries your remaining balance alongside it, so you can track spend without a second call.

{
  "result": 212,
  "from": "c",
  "to": "f",
  "dimension": "temperature",
  "request_id": "37f01edb-0163-42a1-ac51-0acaef979800",
  "credits_remaining": 96
}

Cost

1 credit per call, whether it is run from the site or from the API — the credential differs, the price does not. A new account starts with 20 credits.

A rejected request still costs a credit: the authorizer decrements before the tool validates. A call rejected for a missing or invalid key is free.

Parameters

Generated from the endpoint’s own validation, so this is exactly what it accepts. A body field goes at the top level; an option goes inside options.

Name	In	Type	Default	Notes
value *	body	number	—	The number to convert.
from *	body	string	—	A unit such as km, kg, c or gib. one of b, c, cm, cup, d, f, floz, fps, ft, g, gal, gb, gib, h, in, k, kb, kg, kib, km, kmh, kn, l, lb, m, m3, mb, mg, mi, mib, min, ml, mm, mph, mps, ms, nmi, oz, pt, qt, s, st, t, tb, tbsp, tib, tsp, wk, yd
to *	body	string	—	A unit of the same kind — converting mass to length is refused. one of b, c, cm, cup, d, f, floz, fps, ft, g, gal, gb, gib, h, in, k, kb, kg, kib, km, kmh, kn, l, lb, m, m3, mb, mg, mi, mib, min, ml, mm, mph, mps, ms, nmi, oz, pt, qt, s, st, t, tb, tbsp, tib, tsp, wk, yd
precision	options	integer	10	Decimal places in the result. 0 to 15