Skip to content

UnifyUnits Developers

Search docs

OpenAPI Website Get API key →

Profile API keys Usage Billing & plan Admin

Start

Overview Why UnifyUnits Quickstart Playground Pricing Authentication

Account

Profile API keys Usage & billing

Conversion

Single conversion Batch conversion Precision & values Normalize Currency Substances Unit price Locale formatting

Units

Categories & units Unit identifiers Aliases

API reference

Overview GET /v1/convert POST /v1/convert POST /v1/batch POST /v1/parse POST /v1/normalize POST /v1/currency/convert GET /v1/currency/rates GET /v1/substances POST /v1/substance/convert POST /v1/unit-price GET /v1/categories GET /v1/categories/:id GET /v1/units GET /v1/units/:id GET /v1/health GET /openapi.json Errors

Usage & limits

Guides

cURL JavaScript / TypeScript Python PHP MCP server

Platform

Security Versioning Changelog Troubleshooting Support Operator

Account

Manage your profile, API key and plan for the Measurement API.

Profile API keys Usage & billing

Sign-in failed. Try again with Google. If it keeps failing, contact support with the approximate time of the attempt.

Loading your account

Sign in to manage your account

Free plan includes 10,000 conversions per month, 100 requests per 60 seconds, and batch conversion up to 100 items. One active key per Google account.

Sign in with Google

Could not load your account

Plan & usage

Plan-

This month-

Last 30 days-

Burst limit-

Billing

UnifyUnits Measurement API

Support OpenAPI UnifyUnits.com