All tools

Find a calculator

Every calculator is listed.

Money

MortgagePopular

Payment with tax, insurance, PMI, HOA, and the amortization.

Loan

Monthly payment, interest, and a schedule you can scan.

Debt payoff

Snowball and avalanche, side by side.

Interest

The same rate, with and without interest on the interest.

Investment growth

A starting balance plus a monthly deposit, grown over time.

Budget

Income, the bills, and what is left.

Savings goal

How long a goal takes, or what to set aside.

Seller tools

Etsy fees

Listing, transaction, processing, and optional offsite ads.

Shopify fees

Plan cost and card fees against a product’s price.

Print-on-demand

Retail price minus the blank, the shipping, and a platform fee.

Church & nonprofit

Giving

A percent of income, per paycheck and per year.

Building fund

What is left, and what each month needs to cover.

Budget shortfall

The gap between income and the spending plan.

Farm

Feed cost

Bags and dollars for a pen over a set number of days.

Seed spacing

Plants per acre from row spacing, plus seed to order.

Crop yield

Bushels or bales, times a price, minus cost.

Math

Basic

Add, subtract, multiply, and divide, with parentheses.

Scientific

Powers, roots, logs, and trigonometry.

PercentagePopular

A part of a whole, a share, a change, or a markup.

Conversions

Inches and centimeters

Either direction, using 2.54 centimeters to the inch.

Pounds and kilograms

Avoirdupois pounds and kilograms.

Fahrenheit and Celsius

The two everyday temperature scales.

Miles and kilometers

Statute miles and kilometers.

Health

BMIPopular

Body mass index from height and weight. Not a diagnosis.

Calorie needs

A maintenance estimate from the Mifflin-St Jeor equation.

Due date

A 280-day estimate from the last menstrual period.

Body fat

The Navy circumference method. A tape, not a lab.