Statistics & Science Tools

Statistics & Science Tools cover the statistics, probability, and physics formulas that come up in coursework, research, and home projects — confidence intervals, A/B test significance, Newton's laws, and how much paint or concrete a job actually needs. Students and researchers use them to check a calculation or explore how a formula behaves; DIY planners use the home energy and materials tools to size a project before buying supplies. Every tool shows the underlying formula, not just the answer.

Statistics & Probability

Confidence intervals, sample sizes, and significance testing for research and experiments.

Confidence Interval Calculator

Calculate a confidence interval for a sample mean, at 90%, 95%, or 99% confidence.

Sample Size Calculator

Work out how many respondents you need for a survey or study.

A/B Test Significance Calculator

Find out whether your A/B test result is statistically significant, or just noise.

Bayes' Theorem Calculator

Find the true probability of a condition given a positive test result.

Birthday Paradox Calculator

In a group of just 23 people, there's a 50% chance two share a birthday. See how the odds…

Poker Hand Probability Calculator

Exact odds of being dealt any 5-card poker hand from a standard 52-card deck.

Physics & Engineering

Newton's laws, Ohm's law, and unit conversions for coursework and quick engineering checks.

Force / Mass / Acceleration Calculator

Newton's second law, F = ma — solve for any missing variable.

Ohm's Law Calculator

V = IR — solve for voltage, current, or resistance, plus power dissipated.

Electrical Power Calculator

P = IV = I²R = V²/R — choose which two variables you know.

Projectile Motion Calculator

Range, maximum height, and time of flight for a launched projectile, with the trajectory…

Unit & Measurement Converter

Convert between length, mass, volume, temperature, area, speed, pressure, energy, power,…

Home & Energy Projects

Size a renovation, solar install, or generator before you buy materials or equipment.

Home Electricity Consumption Estimator

Select your appliances and see your estimated electricity cost, broken down.

Solar Panel Savings Estimator

Estimate how much solar panels could generate and save you, based on your roof and locati…

Solar Yield Calculator

Estimate annual solar PV energy output for any location using EU JRC PVGIS radiation data…

EV vs Petrol Cost Calculator

Compare running costs, 5-year TCO, and CO₂ savings between an EV and a petrol car.

Generator Size Calculator

Select the appliances you need to power to get a recommended generator size.

Paint Coverage Calculator

Work out how much paint you need, and how many tins to buy.

Flooring / Tiling Calculator

Work out how many tiles or boards you need, and the total cost.

Concrete Volume Calculator

Work out how much concrete you need for a slab, column, or footing.

Related calculators

Health Calculators

Body composition, fitness, and health risk calculators built on validated clinical formulas — BMI, calorie needs, cardiovascular risk, and life expectancy.

Developer Tools

Validation, lookup, and encoding APIs for developers — email and phone validation, DNS and SSL lookups, JWT decoding, hashing, and password generation.

Global Data Tools

Country comparison calculators covering cost of living, air quality, safety, and climate fit, built from World Bank, WHO, and government data sources.