A little less mental math

Free Calculators for Recipes, Groceries & Reading

Small, useful tools for the calculations that interrupt your day. Open a calculator, change the example numbers, and download your result.

Recipe serving size calculator ↗Halve, double, or resize ingredients. Enter fractions and keep the units from your original recipe.Grocery budget calculator ↗Split a weekly or monthly budget across your household, with an optional spending buffer.Reading time calculator ↗Turn word count and your own reading pace into minutes and manageable sessions.

Use the answer, understand the method

Each calculator includes its formula, a worked example, and the limits of what it can tell you. The calculations happen locally in your browser. No account, payment, or app download is needed, and your entries are not uploaded by these tools.

Continue with a practical template

Check a saved recipe with the recipe import checklist, plan around your cupboards with the pantry-first weekly template, or track understanding with the reading comprehension log. These original templates are free to copy and adapt.

Made by Soldra, the independent studio behind focused iPhone apps. Browse the guides for more detailed workflows.

By Soldra · Published September 15, 2026. Editorial policy and corrections.