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Tip Calculator

Quick tip & split calculator for dining and shared bills.

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Utilities

Unit Converter

Convert lengths, masses, volumes, areas and temperatures between common units.

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Finance

Net Present Value (NPV) Calculator

Calculate the net present value (NPV) of an investment or project. Enter your initial investment, discount rate, and future cash flows to see if your project is profitable.

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Mathematics

Inequality Solver

Solve simple linear inequalities of the form ax + b [<, <=, >, >=] 0 and get interval solutions.

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