Overview
CalculatorFox is a free online calculator library delivering 1,336 tools across 23 subject categories, ranging from mortgage payments and tax bands to BMI, tire sizing and chemistry conversions. Every calculator displays step-by-step workings and cited sources, and any tool can be dropped into an external website with three lines of code.
Key Features
- Broad calculator library: 1,336 calculators are organised into 23 categories, including loans and banking (104 tools), investment and retirement (102), tax and payroll (140), fitness and nutrition (162) and math and algebra (109). A search field on the homepage filters the catalogue by job to be done.
- Transparent workings and sources: Results arrive with an expandable breakdown, such as a mortgage example that walks through loan amount, principal and interest, escrow items and total monthly payment in five steps, with references to HUD Mortgagee Letter 2023-05 and nine further sources.
- Embeddable widgets with hosted figures: Publishers generate an embed from a builder, set the starting values a calculator opens with, and lock fields readers should not change. Those figures live in the account rather than the page markup, so a single update propagates to every embed on the next load.
- Tiered plans for personal and professional use: A free embed tier sits alongside paid Personal and Advisor plans. Personal covers saved scenarios, side-by-side comparison, export and sharing without ads, while Advisor adds client reports, client-grouped scenarios and one embed per website with its own token and colour.
Target Audience
Finance, health, tax and construction publishers plus advisers and small business owners who need accurate calculators to reuse, embed or hand to clients under their own brand.
