More Tools & Free Online Utilities
Additional specialized calculators and utilities for all your needs
Energy & Utilities
Engineering Tools
Pipe Flow Calculator
Calculate fluid flow in pipes
Pump Head Calculator
Calculate total dynamic head
Rainwater Calculator
Calculate rainwater harvesting potential
Ventilation Calculator
Calculate air changes and fan capacity
Heat Loss Calculator
Calculate building heat loss and energy needs
Heat Index Calculator
Calculate feels like temperature
Horsepower Calculator
Calculate engine power from vehicle data
RC Car Gear Ratio Calculator
Calculate gear ratios for RC cars
3D Printing Cost Calculator
Calculate material and labor costs for 3D prints
Lawn Fertilizer Calculator
Calculate fertilizer needs based on lawn size and N-P-K ratios
Sustainability
Solar Power Tools
Utility Tools
Date Calculator
Calculate time between dates
Age Calculator
Calculate exact age from birth date
BMI Calculator
Calculate Body Mass Index
Random Generator
Generate random numbers
Password Generator
Generate secure passwords
Bra Size Calculator
Calculate bra size with international conversions
Pregnancy Conception Calculator
Calculate conception date and possible range
Jeans Size Calculator
Find your perfect jeans size with international conversions
Fuel Cost Calculator
Calculate trip fuel costs and estimate expenses
Golf Handicap Calculator
Calculate golf handicap index and course handicap
Army Body Fat Calculator
Calculate body fat using U.S. Army standards
Body Surface Area Calculator
Calculate BSA using multiple medical formulas