8 calculators
Free password generator: create strong, secure, random passwords with customizable length, uppercase, lowercase, numbers, and symbols. Generate uncrackable passwords instantly.
Free random number generator: generate random numbers within any range. Perfect for lotteries, giveaways, games, statistical sampling, and decision making.
Free discount calculator: calculate savings and final price after any percentage discount. Add sales tax for the final out-the-door price. Perfect for shopping and sales.
Free fuel cost calculator: estimate trip fuel costs based on distance, fuel consumption rate, and current fuel prices. Plan your road trip budget and compare vehicle efficiency.
Free electricity cost calculator for estimating daily, monthly, and annual energy charges from kWh usage and your tariff.
Free wire size calculator for estimating copper conductor area from voltage, current, cable length, and permitted voltage drop.
Free pool heater BTU calculator for estimating the heater output needed to raise pool water to a target temperature in a chosen time.
Free battery life calculator: convert mAh and volts into watt-hours, then divide by your device's wattage to see how many hours one charge will last.