Date Difference Calculator

Calculate the number of days, weeks, months and years between two dates.

Discount Calculator

Calculate the final price and savings after one or two successive discounts.

Excavation Calculator

Calculate excavation volume and bulked soil volume for a foundation trench or pit.

Footing Calculator

Size an isolated square footing based on column load and soil bearing capacity.

GST Calculator

Add or remove GST from an amount, in either exclusive or inclusive mode.

Length Converter

Convert length between millimeters, centimeters, meters, kilometers, inches, feet, yards and miles.

Loan Calculator

Calculate loan installments, total interest and total cost including processing fees.

Profit Margin Calculator

Find the selling price needed to hit a target profit margin on a product.

Mortgage Calculator

Calculate your monthly mortgage payment including property tax and insurance.

Paint Calculator

Estimate how many liters of paint you need for a wall, accounting for coats and openings.

Payroll Calculator

Calculate gross salary, tax and net take-home pay including overtime.

Percentage Calculator

Calculate percentages, percentage of a value, or percentage change between two numbers.