Simple tools. Clear answers.
SolveKit is a collection of practical online calculators, converters and comparison tools for everyday questions involving money, business, maths and common unit conversions.
What SolveKit is for
The goal is to help you get a useful estimate quickly, understand what the result means, and see the assumptions behind it. The tools are designed to be straightforward to use without creating an account.
Tools for everyday decisions
SolveKit includes calculators for loans and savings, percentages and ratios, salary and business arithmetic, age calculations, and common unit conversions. Each tool page should explain its purpose, inputs, method and important limitations.
Clarity and privacy
In this temporary build, calculator computations run in your browser. The homepage can save a short list of recent tool results in your browser storage so you can reopen them; this is not the same as an online account. Read the Privacy Policy for details and limitations.
Important limitation
SolveKit is a general-purpose tool, not a bank, investment adviser, accountant, tax filing service or legal professional. Outputs—especially financial and tax estimates—depend on the inputs and assumptions used. Confirm important decisions using authoritative sources and relevant product terms.
Temporary test build · Last reviewed: 9 October 2026