Disclaimer
Please read this disclaimer carefully before using any calculator on CalculatorPlus or relying on a result. By using this website and its tools, you accept the terms set out below.
What These Tools Are For
CalculatorPlus provides free calculators built to make everyday and specialist calculations quick and easy. Our goal is to give you a fast, clear result together with the formula and a worked example, so you can understand and check the math yourself.
We have worked hard to make every calculator accurate — each formula is researched, stated on the page, and tested against known-correct results before it goes live. Even so, these are automated tools, not a professional service, and they cannot know the full details of your specific situation.
Always Verify Before You Act
Do not rely solely on any calculation from this website. Always double-check important results independently before you act on them — and treat every output as an estimate to be confirmed, not a final authoritative figure.
This is especially important for anything involving legal, financial, tax, insurance, medical, or safety matters, where a small error or an out-of-date figure can have serious consequences. Verify the result, the formula, and any rate it uses against an authoritative source before making a decision.
Not Professional Advice
Nothing on CalculatorPlus is professional advice, and no calculator is a substitute for a qualified professional who knows your circumstances. Medical and dosage tools are not medical advice — consult a healthcare professional. Legal and insurance tools are not legal advice and do not represent what any court, insurer or agency will decide — consult a licensed attorney. Financial, tax and retirement tools are not financial or tax advice — consult a qualified adviser or accountant.
In legal matters in particular, always speak with a legal adviser before moving forward. Laws, guidelines and official schedules vary by jurisdiction and change over time, and only a professional can apply them to your case.
Rates, Brackets and Fees Change Over Time
Some calculators depend on a rate, bracket, fee or price set by an outside authority — such as a tax rate, a Treasury bond rate, a state fee schedule, or a child-support schedule. For those tools we cite the source, show the value and the date we last verified it, and let you edit the figure.
These values change, sometimes with little notice. The default we show may become out of date between our reviews, so always confirm the current figure with the issuing authority before relying on it.
Help Us Improve — Report an Error
We want these tools to be exactly right. If you find a calculator that gives a result you believe is wrong, or a formula that does not do what it is meant to, please contact us through our contact page and tell us what you entered and what you expected.
We read every message, take accuracy seriously, and correct confirmed errors promptly. Your feedback directly helps us make these calculators better for everyone.
Limitation of Liability
The calculators and content on CalculatorPlus are provided free of charge and "as is," without any warranty of any kind, express or implied, including any warranty of accuracy, completeness, or fitness for a particular purpose.
To the fullest extent permitted by law, CalculatorPlus and its owners and contributors accept no legal obligation or liability for any loss, damage, cost or consequence arising from your use of, or reliance on, any calculator, result, or information on this website. You use these tools entirely at your own risk, and you agree that you will not hold CalculatorPlus liable for any outcome that follows from relying on a calculation. If you do not accept this, please do not use the tools.
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CalculatorPlus has free tools across finance, construction, math, health and more — each one showing the formula and a worked example.