About Us

Built for people who want to understand their money

Not just the numbers — the reasoning behind them.

What Calculious Is

Calculious is a free financial tools and education platform built for individuals in India, the United States, the United Kingdom and Australia. Every calculator is built from primary source data — actual tax legislation, ATO tables, HMRC rates, IRS publications — not approximations or third-party APIs that can silently go stale.

We cover the questions real people Google at 11pm: "What will my actual take-home be on this salary?" "How much CGT will I pay if I sell now vs next year?" "How much interest am I actually paying on this loan?"

Why We Built It

Most financial calculators online fall into one of three traps: they're too simplified (ignoring surcharge, Medicare Levy Surcharge, the UK 60% trap), they're geographically limited (built for one country, useless for everyone else), or they require you to create an account just to do basic maths.

Calculious is none of those things. Everything runs locally in your browser — no account, no sign-in, no data transmitted anywhere. Your numbers stay yours.

What We Cover

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6 Calculators Income Tax, Take-Home Pay, Loan EMI, Savings Growth, GST/VAT/Sales Tax, Capital Gains

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4 Countries India, USA, UK, Australia — each with country-specific tax rules

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18+ Guides Original articles with worked examples, not AI-generated filler

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Private by Design No login, no data storage, all calculations happen in your browser

Data Sources

We update our tax data from official government sources each financial year:

India: Income Tax Department (incometax.gov.in), CBDT circulars, Finance Acts, GST Council notifications, CBIC
USA: IRS Revenue Procedures (Rev. Proc.), IRS Publications 15, 550, 523. Social Security Administration wage base.
UK: HMRC (hmrc.gov.uk), gov.uk rate tables, Finance Acts. Scottish rates from Scottish Parliament.
Australia: Australian Taxation Office (ato.gov.au), Treasury Budget papers, ASIC.

Accuracy & Limitations

Our calculators handle the most common scenarios correctly. There are edge cases we simplify or omit: inter-state variation in US sales tax, Scottish income tax rates, complex superannuation defined benefit schemes, and situations involving multiple income sources across countries. For personal tax advice specific to your situation, consult a qualified tax professional.

All information on Calculious is for educational purposes only and does not constitute financial, tax, or legal advice.

Questions or feedback?

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