Computing, IT, Networking & Security 4 calculators
- Image File Size Calculator (Bitmap & Compressed)SI and IEC 80000-13 prefixesAn uncompressed image is exactly as big as its arithmetic says: width times height times bits per pixel, divided by eight. This…
- IPv4 Subnet Calculator (CIDR)RFC 4632 (CIDR), RFC 950, RFC 1918Give this calculator an IPv4 address and a prefix length and it resolves the address to the block it belongs to: the network…
- IPv6 Subnet & Prefix CalculatorRFC 4291 / RFC 5952Give this calculator an IPv6 prefix and a target subnet size and it returns the first and last address in the block, how many…
- IT Downtime Cost CalculatorBusiness impact analysis, NIST SP 800-34 Rev. 1This calculator turns an outage into a number you can put in a budget request. It splits the cost of downtime into the four…
Investing & Retirement 4 calculators
- Inflation-Adjusted (Real) Return CalculatorFisher equationA 7% return with 3% inflation is not a 4% real return — it is 3.8835%. This calculator applies the Fisher equation…
- Inherited IRA RMD CalculatorIRS Publication 590-B Table I; SECURE Act 10-year ruleWhich schedule applies to an inherited IRA depends on who you are and when the owner died, and the two possibilities look…
- Investment Capital Gains Tax CalculatorIRC §1(h) & §1411 · 2025 tax yearEnter what you paid, what you sold for, how long you held, and your income, and this calculator returns the tax bill on the…
- Investment Goal Timeline CalculatorThis calculator solves the time-value-of-money equation for the one variable most people actually want: when . Give it what you…
Insurance & Risk Management 3 calculators
- IBNR Loss Reserve CalculatorChain-ladder development method; ASOP No. 43Losses that have already happened are not yet all known. Some claims have not been reported, and the ones that have are carried…
- Insurance Loss Ratio CalculatorNAIC Annual Statement definitionsThe loss ratio is incurred losses divided by earned premium, and it is the single number that says whether an insurance rate is…
- Insurance-to-Value & Underinsurance CalculatorCoinsurance condition, ISO commercial property formsInsure a building for less than the percentage of its value your policy requires and the insurer does not simply cap your…
Personal Finance, Loans & Credit 3 calculators
- Income-Driven Repayment (IDR) CalculatorFederal income-driven repayment (34 CFR 685)Every federal income-driven repayment plan works the same way: take your adjusted gross income, subtract a multiple of the…
- Inflation Purchasing Power CalculatorCPI-U index method (BLS)Inflation does not change the number in your account; it changes what the number buys. This calculator shows both sides of that…
- Interest-Only Loan Payment CalculatorRegulation Z (12 CFR 1026.43)An interest-only loan charges you only the interest for an opening period, so the balance does not move and the payment is…
Accounting & Financial Statement Analysis 2 calculators
- Interest Coverage Ratio CalculatorUS GAAP / IFRS income-statement definitionsInterest coverage says how many times over your operating profit could pay this year’s interest bill. This calculator returns…
- Inventory Turnover Ratio CalculatorUS GAAP ASC 330 / IFRS IAS 2 · 365-day conventionInventory turnover counts how many times a year you sell and replace your entire stock. Enter cost of goods sold and the…
Agriculture, Livestock & Landscaping 2 calculators
- Implement Field Capacity CalculatorASABE D497 / EP496 machinery management dataEnter how wide your implement is, how fast you pull it and how much of each hour is productive, and this calculator returns the…
- Irrigation Run Time CalculatorIrrigation Association audit methodThis calculator answers the only irrigation question most people actually have: how many minutes should this zone run? Give it…
Biology, Genetics & Clinical Lab 2 calculators
- IV Drip Rate Calculator (gtt/min)Gravity infusion drop-factor methodThis calculator turns an order such as 1,000 mL over 8 hours into the number you actually set at the roller clamp: drops per…
- IV Infusion Rate Calculator (mL/hour)ISMP standard concentration methodThis calculator converts an ordered infusion dose — 1,000 units/hour of heparin, 200 mg/hour of an antibiotic, 0.5 mg/kg/hour…
Calculus, Linear Algebra & Discrete Math 2 calculators
- Implicit Differentiation CalculatorImplicit function theoremEnter an equation in x and y — one side on the left, one on the right — and this calculator produces dy/dx without ever solving…
- Indefinite Integral CalculatorStandard integration rules: power, substitution, by partsEnter a function and this calculator finds its antiderivative, splitting the integrand into terms and reporting which rule…
Cooking, Baking & Brewing 2 calculators
- IBU Calculator (Tinseth)Tinseth hop utilization modelThis calculator works out the bitterness each hop addition contributes, in International Bitterness Units, using Glenn…
- Ingredient Weight to Volume CalculatorUS customary cup (236.588 mL)A cup is a unit of volume, so "one cup" means a different weight for every ingredient you put in it — 120 g of spooned flour…
Electrical Trade & Electronics 2 calculators
- Inductive Reactance CalculatorSinusoidal steady-state AC theoryEnter an inductance and a frequency and this calculator returns the coil's reactance in ohms, the current it passes at a stated…
- Inverter Sizing CalculatorNEC 2023 Table 310.16 for DC conductor ampacityAn inverter fails in one of two ways: it overheats and shuts down on a load it could not sustain, or it trips instantly on a…