All tools
150 tools available
Volume Calculator
Calculate the volume of a box, cube, cylinder, sphere or cone.
Loan Calculator
Calculate monthly loan payments, total interest and total repayment.
kWh Calculator
Estimate the electricity cost of running an appliance.
GPA Calculator
Calculate your weighted GPA from grade points and credit hours.
Discount Calculator
Find the sale price and savings from an original price and discount percentage.
Period Calculator
Predict your next period date from your last period and average cycle length.
Time Calculator (Add/Subtract)
Add or subtract two durations in hours, minutes and seconds.
Square Footage Calculator
Calculate total square footage from room dimensions — add multiple rooms.
VAT Calculator
Add or remove VAT from a price at any rate.
Random Topic Generator
Get random topics for writing, debates, videos, or conversation starters.
Image Splitter
Split any image into a grid of equal tiles — perfect for Instagram grids.
WebP to JPG / PNG Converter
Convert WebP images to JPG or PNG — free, in your browser, from a file or an image URL.
Add Border to Image
Add a solid color border of any thickness to your image.
Sales Tax Calculator
Add sales tax to a price and see the tax amount and total.
Net Salary Calculator
Estimate take-home pay from gross salary and a flat deduction rate.