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Number to words

numeral.openverbs.com

Convert between integers (1–3999) and Roman numerals in either direction — a digit string is encoded to Roman, a Roman numeral is decoded to an integer. Non-canonical numerals (IIII, IC) are rejected.

Category
Service
Networks
Base
Starting price
$0.002
Paid calls, 30 days
202

Paid endpoints

4 endpoints, sorted by usage. Prices are per request.

EndpointPriceNetworkCalls / 30d
POST/v1/words

Spell an integer out in English words, e.g. 123 → "one hundred twenty-three". Negatives are prefixed with "minus".

$0.002Base52
POST/v1/ordinal

Format a non-negative integer as an ordinal — both the suffixed form (21st) and the ordinal words (twenty-first).

$0.002Base51
POST/v1/radix

Convert an integer between numeral bases 2–36 (binary, octal, hex, base36, …). Arbitrary size via BigInt; digits are case-insensitive and a leading minus is allowed.

$0.002Base50
POST/v1/roman

Convert between integers (1–3999) and Roman numerals in either direction — a digit string is encoded to Roman, a Roman numeral is decoded to an integer. Non-canonical numerals (IIII, IC) are rejected.

$0.002Base49

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