Useful calculators and tools for everyday decisions.
All tools are free and work directly in your browser. No accounts, no sign-ups.
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Browse all →Electricity Cost Calculator
Estimate how much an appliance costs to run based on wattage, hours of…
Compound Interest Calculator
See how your savings or investments grow over time with compound inter…
Mortgage Calculator
Calculate your monthly mortgage payment, total interest paid, and amor…
Tip Calculator
Calculate a tip and split the bill between any number of people.
Fuel Cost Calculator
Estimate trip fuel costs based on distance, fuel efficiency, and curre…
About MyInstantTool
MyInstantTool is a collection of practical calculators and tools for everyday decisions. Each tool is built around a clear formula, with an explanation of the methodology, a worked example, and frequently asked questions.
The calculations are intended for estimation and planning. For important financial decisions, consult a qualified professional.