Free Tools & Calculators

Small, fast, free calculators from the apps we build. No signup, nothing gated.

Travel from The Travel Binder

Packing List GeneratorTrip length, climate and style in — a categorised list with quantities out.
Presets
- Japan in winter
- Japan in spring
Japan Trip Cost CalculatorNights and travel style in — a line-by-line budget, per person and per day.

Baking from The Bake Log

Sourdough Hydration CalculatorFlour, water and starter in — true hydration % out, or work backwards from a target.
Baker's Percentage CalculatorScale any bread formula from flour weight or target dough weight.
Starter Feeding Ratio Calculator1:1:1, 1:2:2, 1:5:5 — exact feed amounts and expected peak times.
Dough Temperature CalculatorHit a target dough temperature — the water temp you need, from flour and room.
Pizza Dough CalculatorStyle and ball count in — flour, water, salt, oil and yeast out.

Coffee from Kohii

Wine from Cellar Book

Plants from Leaflet

Plant Watering CalculatorWatering intervals by species, season and light.
By plant

Consumer rights from Warranty Box

UK Return Rights CheckerWhich legal return or refund window you're in, from the purchase date.