Free calculators
Updated 2026-08-04
Small, free tools for the arithmetic that trips people up. No sign-up, no email capture, nothing sent anywhere — every calculation runs locally in your browser.
- MRR calculator — combine monthly, annual and weekly plans into one correctly normalised figure
- Annual-to-monthly normaliser — convert any billing interval to its monthly equivalent
If you want this computed automatically from your live data instead of typed in by hand, that is what FRGMNT does across five platforms.
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