Tools
Love compatibility, random generators, GPA, and just-for-fun tools.
25 calculators in Tools
Battery Life Calculator
Estimate device battery life based on capacity and usage.
Bitrate Calculator
Calculate video/audio bitrate, file size, and storage requirements for your media.
Book Royalties Calculator
Estimate author earnings from book sales. Calculate per-copy royalties, gross earnings, net income, and advance earn-out copies.
Color Converter
Convert between HEX, RGB, HSL color formats.
Crop Factor Calculator
Calculate the full-frame equivalent focal length, depth-of-field equivalent aperture, and field of view for any camera sensor.
Data Usage Calculator
Estimate monthly data usage from your online activities.
Depth of Field Calculator
Calculate near focus limit, far focus limit, total depth of field, and hyperfocal distance from focal length, aperture, subject distance, and sensor size.
Download Time Calculator
Estimate file download time based on your connection speed.
DPI Calculator
Calculate DPI from image dimensions and print size, or find maximum print size from resolution and target DPI.
Fabric Yardage Calculator
Estimate how much fabric you need for any sewing project based on project type, measurements, fabric width, and pattern matching.
Focal Length Calculator
Calculate the angle of view and 35mm equivalent focal length for any camera lens and sensor size.
Generation Checker
Find which generation you belong to based on your birth year.
Knitting Gauge Calculator
Adjust any knitting pattern to your personal gauge. Calculate exact stitch and row counts for your desired dimensions.
Laser Cutting Cost Calculator
Estimate laser cutting time and cost by material type, thickness, and machine hourly rate.
Morse Code Translator
Translate text to Morse code and Morse code back to text.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal bases.
PC Build vs Prebuilt Calculator
Compare the total cost of building a custom PC from individual components versus buying a prebuilt system to find which option costs less.
Photo Print Size Calculator
Check if your image resolution is sufficient for common print sizes at a target DPI.
Pixel Density (PPI) Calculator
Calculate pixels per inch, pixel pitch, and display quality from screen resolution and size.
3D Print Cost Calculator
Estimate the total cost of a 3D print including filament, electricity, and printer depreciation.
QR Code Generator
Generate QR codes for URLs and text.
Screen Size Calculator
Compare screen sizes and calculate viewing area, pixel density, and dimensions.
Streaming vs Purchase Calculator
Compare total cost of streaming subscriptions versus buying media outright to find which option saves more money.
Subnet Calculator
Calculate IPv4 subnet details from an IP address and CIDR prefix.
Unit Price Calculator
Compare unit prices to find the best deal when shopping.