eBay Fee Calculator
See what you keep after eBay fees, shipping and item costs.
Selling · FREE
4 free tools
3D & energy tools.
Turn material, machine time and energy into clear numbers.
Marketplace Profit Calculator
Put selling price, platform fees and fulfillment costs in one place.
Selling · FREE
Profit Margin & Markup
Understand the difference between margin, markup and gross profit.
Selling · FREE
Break-Even Calculator
Find the number of sales needed to cover your fixed costs.
Selling · FREE
Discount Calculator
Get the sale price, savings and an optional after-discount tax estimate.
Selling · FREE
Payment Fee Calculator
Work backward from the amount you need to receive after processing fees.
Selling · FREE
3D Print Cost Calculator
Price a print with material, energy, machine time, labor and margin.
3D & energy · FREE
Filament Cost Calculator
Turn slicer grams and spool price into a material cost per print.
3D & energy · FREE
Resin Cost Calculator
Estimate liquid resin cost from print volume and bottle volume.
3D & energy · FREE
Electricity Cost Calculator
Estimate energy use and cost for a device over your chosen period.
3D & energy · FREE
Percentage Calculator
Find a percent of a value, a percentage ratio or a percentage change.
Converters · FREE
Length Converter
Convert millimeters, centimeters, inches, feet, meters and more.
Converters · FREE
Weight Converter
Convert grams, kilograms, pounds, ounces and metric tonnes.
Converters · FREE
Temperature Converter
Convert Celsius, Fahrenheit and Kelvin with absolute-zero checks.
Converters · FREE
Data Size Converter
Translate decimal and binary storage sizes without mixing GB and GiB.
Converters · FREE
Word Counter
Count words, characters and lines with an instant reading-time estimate.
Text & dev · FREE
Case Converter
Switch between sentence case, title case, uppercase and lowercase.
Text & dev · FREE
URL Slug Generator
Turn a title into a clean, lowercase, hyphen-separated URL slug.
Text & dev · FREE
JSON Formatter
Validate, pretty-print or minify JSON entirely in your browser.
Text & dev · FREE
URL Encoder / Decoder
Encode or decode a URL component with clear malformed-input feedback.
Text & dev · FREE
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