12 free tools · no signup · no ads over results

Free calculators & converters

No bloat. No popups. Every formula cites its source. Built by Jawad Hassan.

New

Creator economy tools

Calculate real take-home from platforms — all formulas sourced from official docs

Calculate net take-home earnings after Substack's 10% platform fee and Stripe payment processing costs.

Estimate TikTok Creator Rewards Program earnings based on views, RPM bracket, and region.

Calculate US quarterly estimated tax payments including self-employment tax and income tax for freelancers and sole proprietors.

Convert Twitch Bits to USD creator payout. Calculate exactly how much you earn from Bit cheers.

Everyday math tools — fast, accurate, no clutter

Calculate your Body Mass Index with category classification, healthy weight range, and interpretation.

Calculate percentage, percentage change, and percentage of a number instantly.

Calculate exact age in years, months, days, hours, and minutes from any birth date.

Calculate monthly loan repayments, total interest, and amortization schedule.

Calculate tips and split the bill between any number of people.

Calculate the sale price, discount amount, and savings percentage for any original price.

Instant conversion between metric and imperial units

No account neededUse every tool instantly, no signup ever

Source-linked formulasEvery formula cites the official documentation

Client-side onlyCalculations run on your device — nothing is tracked