Everyday helpers like tip, fuel cost, age, GPA, passwords and more handy utilities.
Discount Calculator
Quickly find the sale price and amount you save.
OpenTip Calculator
Split the bill and calculate the tip.
OpenFuel Cost Calculator
Estimate the fuel cost of a trip.
OpenPassword Generator
Generate a strong random password.
OpenIP Subnet Calculator
Compute network, broadcast and host range from CIDR.
OpenTire Size Calculator
Overall diameter and circumference from tire specs.
OpenGolf Handicap Calculator
USGA-style handicap differential from a single round.
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