Free calculators
Small, fast, no-signup calculators. Each one is the kind of live math Core Forms' data variables run inside WordPress forms — built here as standalone pages. Nothing you type leaves your browser.
Pay raise calculator
Old pay and new pay in, raise percentage out — or apply a percentage to see the new number, with monthly and weekly breakdowns.
Open calculator → ReviewsStar rating calculator
Enter your 1–5 star review counts, get the weighted average — and how many 5-star reviews it takes to reach your target rating.
Open calculator → MeasurementTriangle area calculator
Base × height or three sides via Heron’s formula, converted to square feet, square meters, and acres.
Open calculator → LicensingLicense key generator
Cryptographically random license keys in hex, UUID, or segmented format — up to 100 at a time, with CSV export.
Open calculator → MoneyStripe fee calculator
Enter a price, see Stripe’s fee and what you keep — or work backwards from the amount you want to receive.
Open calculator →