Simple tools for better decisions.

Free calculators and practical tools designed to give you clear answers without unnecessary complexity.

Useful tools

Simple calculators and utilities for everyday decisions.

Calculate the total and recurring cost of your monthly and yearly subscriptions to help you better manage your expenses.

Split after-tax income into needs, wants, and savings with adjustable percentages and monthly or yearly results.

Calculate normal distribution probabilities, percentiles, and z-scores with a clear bell curve visualization.

Calculate a z-score from a value, mean, and standard deviation, with percentile and interpretation.

Look up cumulative standard normal probabilities to the left of a z-score.

Calculate adult BMI from height and weight in US or metric units and see the corresponding adult BMI category.

Estimate basal metabolic rate with the Mifflin-St Jeor equation using age, sex, height, and weight.

Estimate body-fat percentage for men and women from circumference measurements, with US and Metric unit support.

Estimate TDEE, maintenance calories, BMR, and daily calorie targets based on your activity level.

Find tools grouped by what you want to calculate or plan.

More useful tools are added as they become ready.