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Tiny Tools.
Big Answers.

Free calculators and utility tools for math, business, and everyday problem-solving. From churn rate to exam grades to cooking conversions — if there’s a number to compute, we have a tool for it.

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Most Used This Month

Our highest-traffic tools — tested and maintained

AVG
Average Calculator
Mean, median, mode — all in one
DER
Derivative Calculator
Step-by-step derivative solver
BE
Break-Even Analysis
Units & revenue to hit breakeven
CV
Cylinder Volume
V = πr²h, instantly
CR
Churn Rate Calculator
Customer retention metrics
X²
Chi-Square Calculator
Goodness of fit & independence
FG
Final Exam Grade
What score do you need?
CC
Cooking Converter
Cups, grams, oz — instantly
HT
Hiking Time Estimator
Time from distance & gain
KM
Kitchen Measurement
Ingredient substitutions

Who Uses TinyTool

Practical tools for real work

Students & Researchers

From chi-square tests to derivative solving and final exam grade tracking — get the math right without wrestling with a graphing calculator.

Business & Work

Find your breakeven point, track customer churn, compare actual vs planned budgets, or price out catering per head. Built on standard formulas — no black boxes.

Everyday Life & Cooking

Convert cooking measurements, find ingredient substitutions, estimate hiking time, or count down to a birthday. Calculations people actually need in daily life.

Browse by Category

All free, no account required

Math & Science

Math Average Calculator Mean, median, mode Math Derivative Calculator Step-by-step solving Stats Chi-Square Calculator Goodness of fit Math Inverse Trig Calculator arcsin, arccos, arctan Physics Center of Gravity Find the balance point Geometry Cylinder Volume V = πr²h Physics Drag Coefficient Aerodynamic drag Physics Downforce Calculator Aerodynamic downforce

Business & Work

Business Break-Even Analysis Units to profitability SaaS Churn Rate Calculator Customer retention metrics Business Budget Variance Actual vs planned budget Events Catering Cost Per Head Per-person catering budget

Lifestyle & Cooking

Cooking Cooking Converter Cups, grams, oz, tsp Cooking Kitchen Measurement Ingredient substitutions Outdoor Hiking Time Estimator Time based on distance & gain Lifestyle Birthday Countdown Days until your birthday

Conversion & Utility

Cooking Cooking Converter Cups, grams, oz, tsp Education Final Exam Grade What score do you need? Gardening Greenhouse Area Surface area for ventilation Events Champagne Bottle Count How many bottles for guests Outdoor Hiking Time Estimator Time based on distance & gain Cooking Kitchen Measurement Ingredient substitutions Geometry Cylinder Volume V = πr²h Lifestyle Birthday Countdown Days until your birthday

About TinyTool

TinyTool is built and maintained by an independent developer. It started with a simple frustration: why does finding a reliable, free calculator always involve a black box, a signup wall, or a quietly wrong formula? So the tools we wished existed got built instead — every one shows its math, and none asks you to “upgrade to unlock.”

Every calculator goes through the same routine before it goes live: the formula is sourced from its primary origin, cross-checked against at least two independent references, and tested with worked examples and edge cases. The assumptions are stated on the page itself, so you can verify the math independently of the tool.

From statistical tests for graduate students to measurement conversions for home cooks — if there’s a number to compute, we want the tool to be free and the method to be transparent.

300+
Calculators
5
Areas Covered
100%
Free to Use

Frequently Asked Questions

Most calculator sites bury the math behind ads and “pro” upsells. At TinyTool, every calculator shows the formula it uses and documents its assumptions on the page, so you can verify the result by hand if you want to. Everything is free, and no account or signup is required.
No. Every tool on TinyTool works without an account. We don’t collect your email, we don’t ask for a signup, and we don’t track your calculations. What you calculate is your business.
Yes. We build new calculators based on user requests, prioritizing ones that fill a genuine gap. Send your request via our contact page — describe the calculation you need and, if possible, where the formula comes from. We review every request and typically respond within 5 business days.
Every formula is sourced from its primary origin — tax publications, official rate tables, standards bodies, or peer-reviewed equations — then cross-checked against at least two independent references and tested with worked examples and edge cases before publishing. That said, results are estimates based on the numbers you enter; always verify important figures with the relevant official source or a qualified professional.
We add new calculators on a rolling basis, typically 8–12 per month. We prioritize tools that fill a genuine gap — not variations of what’s already here. We also review existing tools regularly, and when a rule or rate changes, the affected tools are updated.

All calculators on TinyTool are provided for general informational and reference purposes only. Results are estimates based on the inputs you enter and do not constitute financial, tax, legal, medical, or other professional advice. Always verify important figures with the relevant official source or a qualified professional before making decisions. See our full Disclaimer.