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Everyday calculators
Free 3D Print Cost Calculator
Calculate filament weight, electricity cost, machine wear, and total print pricing.
Free Aspect Ratio Calculator & Dimension Scaler
Scale dimensions proportionally and generate responsive CSS padding percentages.
Free Audio File Size Calculator
Estimate WAV, MP3, and FLAC uncompressed and compressed file sizes from duration.
Free Bicycle Gear Inches & Cadence Speed Calculator
Calculate gear inches, development, and speed at cadence for road and gravel setups.
Free BPM to Delay & Reverb Time Calculator
Convert music tempo (BPM) into exact delay milliseconds and vocal pre-delays.
Free Camera Sensor Crop Factor Calculator
Convert focal lengths to 35mm full-frame equivalent field of view and depth of field.
CIDR Subnet & Netmask Calculator
Calculate usable host range, broadcast address, and netmask for any IPv4 prefix.
Free CNC Feeds and Speeds Calculator
Calculate spindle RPM, feed rate, and chip load for wood and aluminum milling.
Free Coffee Brew Ratio Calculator
Calculate coffee dose and water volume for V60, French Press, Aeropress, and Chemex.
Free Coffee Roast DTR & Weight Loss Calculator
Calculate development time ratio (DTR %) and bean moisture weight loss percentage.
Free Concrete Slab & Bag Yardage Calculator
Calculate cubic yards and exact 80lb/60lb premix bags with waste buffer.
Free Conventional Commit Message Generator
Format standard semantic Git commit messages with types, scopes, and breaking changes.