Everyday Life & Household 6 calculators
- Meeting Cost CalculatorFully loaded labour rate (2,080-hour year)This calculator converts a room full of salaries into the dollar cost of the hour they are spending together. It works from…
- Microwave Wattage Conversion CalculatorIEC 60705 rated microwave output powerPackage instructions are written for one specific oven power — usually 1,000 W — and almost nobody owns that oven. This…
- Monthly Parking Pass Break-Even CalculatorA garage quotes you a monthly rate and a daily rate and leaves you to work out which is cheaper. This calculator does it…
- Moving Boxes Needed CalculatorBoxes are sized by volume, so the honest way to estimate them is to estimate the volume of your boxable belongings first and…
- Moving Cost CalculatorFMCSA 49 CFR Part 375This calculator prices your move twice — once as a truck you rent and drive yourself, once as a quote from a moving company —…
- Moving Truck Size CalculatorMover's cube-sheet method (7 lb per cubic foot)Rental trucks are sold by length but filled by volume, so the only way to answer "will it fit" is to convert your contents into…
Unit & Measurement Conversion 6 calculators
- Mbps to MB/s & Download Time CalculatorIEEE 802.3 rate notation / SI decimal prefixesInternet connections are sold in megabits per second and files are measured in megabytes, and the two differ by a factor of…
- Meters to Feet CalculatorInternational foot, 1959 (1 ft = 0.3048 m exactly)Convert meters to feet, to feet-plus-inches and to yards, or run the conversion backwards from feet to meters. The…
- Miles to Kilometers CalculatorInternational mile, 1959 (1 mi = 1609.344 m exactly)Convert a distance between miles, kilometers, meters, yards and nautical miles. The statute mile is exactly 1609.344 meters —…
- Millimeters to Inches CalculatorInternational inch, 1959 (1 in = 25.4 mm exactly)Convert millimeters, centimeters or meters into decimal inches and the nearest usable fraction, or run an inch dimension back…
- MPG to L/100km CalculatorNIST SP 811 / 1959 international yard and poundEnter a fuel-economy figure in whichever unit your window sticker, brochure or dashboard uses, and this calculator restates it…
- MPH to KM/H CalculatorInternational mile (1,609.344 m) and international nautical mile (1,852 m)One mile per hour is exactly 1.609344 kilometres per hour, because the international mile is exactly 1,609.344 metres. This…
Insurance & Risk Management 5 calculators
- Medicare IRMAA Surcharge CalculatorSocial Security Act §1839(i) — income-related monthly adjustment amountIRMAA is the income-related surcharge added to Medicare Part B and Part D premiums for higher-income beneficiaries, and it is a…
- Medicare Late Enrollment Penalty CalculatorBoth Medicare late enrollment penalties are permanent. Part B adds 10% to your premium for every full twelve-month period you…
- Medicare Part D Drug Cost CalculatorPart D standard benefit as redesigned by the Inflation Reduction ActPart D does not charge one rate all year. You pay the whole cost of your drugs until the deductible is met, then a share of…
- Medigap vs Medicare Advantage Cost CalculatorThe two routes through Medicare fail in opposite directions. A Medigap policy charges a large fixed premium and leaves almost…
- Modified Endowment Contract (MEC) Test CalculatorIRC §7702A — seven-pay testSection 7702A draws one line through permanent life insurance. Pay premiums faster than seven level payments would have paid…
Personal Finance, Loans & Credit 5 calculators
- Mortgage Amortization Schedule CalculatorAmortised loan formula (constant payment, declining balance)An amortization schedule is the month-by-month ledger of a fixed-rate loan: what each payment buys in interest, what it retires…
- Mortgage Discount Points Break-Even CalculatorAmortised loan formulaA discount point costs 1% of the loan amount and buys the rate down by a fraction of a percentage point — typically an eighth…
- Mortgage Extra Payment Payoff CalculatorAmortised loan formula with principal prepaymentExtra principal is the one lever on a fixed-rate mortgage that you control completely. This calculator re-amortises your loan…
- Mortgage Payment CalculatorAmortised loan formulaThis calculator gives you the number that actually leaves your bank account each month — not just principal and interest, but…
- Mortgage Refinance Break-Even CalculatorAmortised loan comparison; Regulation Z closing-cost disclosureA refinance is a trade: you pay closing costs now to buy a cheaper payment later. This calculator sets your existing loan…
Computing, IT, Networking & Security 4 calculators
- Mbps to MB/s Speed Converter CalculatorIEC 80000-13 (binary prefixes), SI decimal prefixesYour ISP sells megabits per second. Your browser reports megabytes per second. They differ by a factor of eight, which is why a…
- Mining Difficulty & Expected Block Time CalculatorBitcoin proof-of-work difficulty, 2016-block retargetDifficulty is a statement about work: at difficulty D , a valid block requires about D × 2 32 hashes on average. Divide that by…
- MTBF, MTTR & Availability CalculatorIEC 60050-192 dependability termsEnter how many hours your equipment actually ran, how many times it failed, and how long the repairs took. You get mean time…
- MTU, MSS & Packet Overhead CalculatorRFC 791 / RFC 8200 / RFC 879Every layer of encapsulation steals bytes from the packet that carries your data. This calculator takes the MTU of the…
Electrical Trade & Electronics 4 calculators
- Motor Efficiency CalculatorIEEE 112 efficiency definitions; NEMA MG 1 nameplate valuesTake volts, amps and power factor at the motor terminals, add the shaft power the machine is actually delivering, and this…
- Motor Full Load Amps (FLA) CalculatorNEC (NFPA 70) Article 430Enter a motor’s horsepower or kilowatt rating, its supply voltage, phase, efficiency and power factor, and this calculator…
- Motor Overload & Breaker Sizing Calculator (NEC 430)NEC 2023 (NFPA 70) Article 430Motor circuits are protected twice, by two devices with different jobs, sized from two different currents. This calculator does…
- Motor Torque Calculator (HP, kW and RPM)P = Tω, with NEMA MG 1 torque definitionsEnter a motor's rated power and shaft speed and this calculator returns the full-load torque in both pound-feet and…
Arithmetic, Algebra & Number Theory 3 calculators
- Mixed Number to Improper Fraction CalculatorThis calculator converts in both directions at once. Enter a mixed number such as 3 1/2 and it returns the improper fraction…
- Modulo CalculatorEuclidean division conventionThis calculator reduces a number modulo n using the mathematical convention, so the result is always between zero and n…
- Multiplying Fractions CalculatorFundamental rule of fraction multiplicationMultiplying fractions is the easiest of the four fraction operations: multiply the tops, multiply the bottoms, reduce. No…
Business, Marketing & E-commerce 3 calculators
- Marketing ROI (ROMI) CalculatorROMI as defined in Marketing Metrics (Farris et al.)This calculator turns a campaign into the one number a finance team accepts: return on marketing investment, expressed as a…
- Markup vs Margin CalculatorRetail pricing arithmetic (markup on cost vs margin on price)Markup and margin describe the same dollars of gross profit, but they divide it by different numbers — markup divides by cost…
- MRR CalculatorNon-GAAP operating metricMonthly recurring revenue is the normalised monthly value of every subscription you have contracted right now. This calculator…
Calculus, Linear Algebra & Discrete Math 3 calculators
- Matrix Determinant CalculatorLaplace cofactor expansion and LU factorisationEnter a square matrix row by row and this calculator returns its determinant, expanded along the first row so you can follow…
- Matrix Inverse CalculatorGauss-Jordan elimination with partial pivotingEnter a square matrix and this calculator inverts it by row-reducing the augmented array [A | I] to [I | A⁻¹], the same…
- Matrix Multiplication CalculatorRow-by-column (Cayley) matrix productEnter two matrices row by row and this calculator multiplies them, showing every entry of the answer as the explicit dot…
Chemistry & Chemical Engineering 3 calculators
- Molar Mass CalculatorIUPAC standard atomic weights (abridged, 2021)Type a chemical formula and this calculator returns its molar mass in grams per mole, together with the mass each element…
- Molarity CalculatorIUPAC definition of amount concentration (mol/L)Molarity is moles of solute per litre of finished solution. This calculator works the relationship in all three directions: it…
- Moles to Grams CalculatorSI mole definition (BIPM, 2019) and IUPAC standard atomic weightsThis converts between moles and grams in either direction using n = m ÷ M. Tell it what you have — an amount in moles you need…
Machining, Welding & Metal Fabrication 3 calculators
- Material Removal Rate (MRR) CalculatorMachinery's Handbook unit power methodMaterial removal rate is the volume of metal a cut produces per minute, and it is the single number that decides whether a…
- Metal Weight CalculatorCross-sectional area × length × densityEvery metal weight calculation is the same three-step operation: find the cross-sectional area of the shape, multiply by length…
- Milling Feed Rate (IPM) CalculatorMachinery's Handbook milling conventionThis calculator turns the chip load your tooling catalogue publishes into the F word your control actually needs. Feed per…
AI, LLM & Machine Learning Engineering 2 calculators
- Model Quantisation Memory Savings CalculatorWeight-precision memory accountingA model's weight memory is just parameters times bytes per parameter, so quantisation buys memory in exact proportion to the…
- Model Training Time Estimate CalculatorData-parallel scaling modelThis calculator converts a dataset size, a per-device batch size and an epoch count into the number the scheduler cares about…
Agriculture, Livestock & Landscaping 2 calculators
- Manure Application Rate CalculatorUSDA-NRCS Conservation Practice Standard 590, Nutrient ManagementManure is a fertiliser with an awkward analysis: most of its nitrogen is organic and releases over years, and its phosphorus to…
- Mulch CalculatorVolume geometry; U.S. bulk landscape trade unitsGive this calculator the size of your beds and how deep you want the mulch, and it returns the cubic yards to order, the…
Cooking, Baking & Brewing 2 calculators
- Mash & Sparge Water Volume CalculatorBrewhouse water balance (volume accounting from fermenter backwards)This calculator runs your brew day backwards. It starts from the volume you want in the fermenter and adds back every loss…
- Menu Price CalculatorFood cost percentage pricing methodThis calculator turns a plate cost into a menu price. Enter what the dish costs you to produce and the food cost percentage you…
Corporate Finance & Valuation 2 calculators
- MACRS Depreciation CalculatorIRS Publication 946 — MACRS GDSMACRS is the depreciation system US tax law requires for most tangible property placed in service after 1986. It ignores…
- MIRR (Modified Internal Rate of Return) CalculatorMIRR · Excel conventionThe modified internal rate of return fixes the one assumption that makes plain IRR unreliable: that every dollar a project…
Health, Fitness & Nutrition 2 calculators
- Macro Split CalculatorAtwater energy factors (4/4/9 kcal per gram) and IOM acceptable macronutrient distribution rangesA calorie target tells you how much to eat; a macro split tells you what. This calculator turns a daily calorie figure and a…
- Max Heart Rate CalculatorTanaka (2001) age-predicted HRmaxThis calculator estimates maximum heart rate from age using the four equations in general use — Fox's 220 − age…
Legal, Claims & Settlements 2 calculators
- Marital Property Division CalculatorEquitable distribution and community property divisionA property settlement comes down to one number: the equalising payment that makes two unequal piles of assets add up to the…
- Medical Lien & Subrogation Reduction Calculator42 CFR 411.37 (Medicare procurement-cost reduction)A health plan, hospital or government payer that covered your treatment will assert a claim against your settlement. That claim…
Professional Licensing & Applied Exam Math 2 calculators
- mEq to mg Conversion CalculatorUSP electrolyte labelling in mEq and mmolElectrolyte orders are written in milliequivalents, product labels are printed in milligrams, and laboratory results come back…
- Mohr's Circle & Principal Stress CalculatorPlane-stress transformation (Cauchy)Give this calculator a plane-stress state — the two normal stresses σ x and σ y and the shear stress τ xy acting on a small…
Sports, Games, Gambling Odds & Hobbies 2 calculators
- MOA & MIL Scope Adjustment CalculatorTrue minute of angle (1.04720 in at 100 yd) and the 0.001-radian milliradianMeasure how far your group sits from the point of aim, enter the distance, and this calculator converts the offset into minutes…
- Muzzle Energy & Momentum CalculatorKinetic energy in grain–foot–second units (E = wv² ÷ 450,240)Enter a bullet weight and a velocity and this calculator returns muzzle energy in both foot-pounds and joules, along with…
Statistics & Probability 2 calculators
- Margin of Error CalculatorNormal approximation with finite population correctionThe margin of error is the “plus or minus” attached to a survey result: the half-width of the confidence interval around your…
- Mean, Median, Mode & Range CalculatorDescriptive statistics (measures of central tendency)Paste a list of numbers and this calculator returns the four summary figures every statistics course starts with: the mean, the…