Overview
CalculatorFox is a free online calculator library operated by VISIBILITYOS NETWORK LTD, a company registered in England and Wales under company number 17404974. The platform publishes 1,336 calculators grouped into 23 subject categories, spanning mortgage payments, income tax, payroll, BMI, unit conversion, electrical wiring, construction materials, and gaming tools. Each calculator runs without an account and displays its step-by-step workings beside cited regulatory or reference sources.
What They Offer
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Embeddable calculators: Publishers can place any calculator on an external website using three lines of code at no cost, with no advertising inside the embedded tool and no tracking of their readers.
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Visible workings and citations: Results arrive with a numbered breakdown of every step, and pages reference the underlying sources, as seen in the mortgage payment tool, which cites HUD Mortgagee Letter 2023-05 and nine further references.
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Hosted figures: Businesses can define the starting values a calculator opens with, such as an interest rate, tax band, or their own prices, store those values against an account, and update every embed from one place instead of editing HTML on each page.
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Scenario workspace: Paid Personal plans let users save calculations, compare scenarios side by side, export and share results, and work without advertising interruptions.
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Adviser tools: An Advisor tier supports client-facing reports and branded pages, groups scenarios by client, and issues a separate embed token, colour scheme, and set of figures for each website a firm operates.
Who They Serve
The library addresses a wide audience. Individuals use it for everyday arithmetic, health metrics, and loan planning without registering. Small and mid-sized businesses rely on the commerce, payroll, and operations calculators. Financial advisers, educators, and content publishers use the embed and reporting features to present calculations under their own branding, while the free tier keeps entry costs at zero for casual users.
