Free single-purpose web tools
One job per page. No account, no upload, no waiting for a result.
FigureItFast is 22 free online tools. Each is a single page that loads in well under a second, works on a phone, and does its maths in your own browser — nothing you type is uploaded, stored or sent to a server. No signup wall, no watermark, no “export requires an account”. Jump to the calculators, the generators or the text tools, or see every tool.
Calculators
16 tools- Aquarium Volume CalculatorWork out gallons, litres and filled weight for rectangular, cylinder, bow-front, hex and corner tanks.
- Board Foot CalculatorTotal board feet and cost for a cutlist, plus a log scale for rough logs.
- Business Days CalculatorCount business days between two dates, or add/subtract business days from a deadline — with US federal holidays.
- Coffee Ratio CalculatorDial in the perfect coffee-to-water ratio for pour-over, French press, AeroPress, cold brew, espresso and more.
- Concrete CalculatorConcrete calculator for slabs, footings, round columns and stairs — cubic yards and premix bags.
- Countdown CalculatorCount down to any date and time, with totals in weeks, days, hours and business days — shareable by link.
- Dilution CalculatorSolve C1V1 = C2V2, work out dilution ratios, and plan serial dilution series.
- Fabric CalculatorFabric calculator for curtains, yardage for any project, and yard/metre unit conversion.
- Golf Handicap CalculatorWorld Handicap System index from your last 20 rounds, plus course handicap for today's round.
- Overtime Pay CalculatorOvertime pay calculator with taxes: enter your hours and rate to see regular pay, OT pay, gross and estimated take-home.
- Prorated Rent CalculatorWork out partial-month rent for a mid-month move-in or move-out, compared across three proration methods.
- Quilt Backing and Binding CalculatorQuilt backing, binding and border yardage from your quilt top size.
- Running Pace CalculatorSolve pace, time or distance, get splits and a race-time predictor for any distance.
- Sourdough CalculatorBaker's-percentage sourdough calculator with true hydration, recipe scaling and a levain build helper.
- Time Card CalculatorA weekly time card calculator with lunch break deductions, overtime and pay totals.
- Tire Size CalculatorTire size calculator comparison: diameter, circumference, speedometer error and ride height between two tire sizes.
Generators
3 tools- Cron Expression GeneratorBuild a cron schedule with dropdowns and see it explained in plain English.
- Favicon GeneratorTurn an image or a couple of characters into every favicon size you need, plus a real favicon.ico.
- Signature GeneratorType your name in a cursive signature font, or draw your own, and download it as a transparent PNG.