Agriculture, Livestock & Landscaping 5 calculators
- Farmland Cash Rent CalculatorRevenue-share and land-value capitalisation methods; USDA NASS cash rent dataThere is no single right cash rent, so the working method is to price the land two independent ways and see where they land…
- Feed Conversion Ratio (FCR) CalculatorFeed:gain ratio, as-fed and dry matter basisFeed conversion ratio is the pounds of feed it takes to put on one pound of live weight, and it is the number that decides…
- Fertilizer NPK Requirement CalculatorGuaranteed analysis labelling (AAPFCO Official Publication)A soil test tells you to apply 150 pounds of nitrogen, 60 of P 2 O 5 and 60 of K 2 O per acre. It does not tell you how much…
- Field Acreage & Area CalculatorU.S. survey acre = 43,560 square feet (Public Land Survey System)Enter the dimensions you actually measured and this calculator returns the area in acres, hectares, square feet, square yards…
- Firewood Cord CalculatorNIST Handbook 130 — Method of Sale of CommoditiesMeasure the stack, get the truth. This calculator turns the length, height and piece length of a stacked woodpile into full…
Arithmetic, Algebra & Number Theory 5 calculators
- Factorial Calculator (n!)Gamma function; Legendre's formula for trailing zerosThe factorial of a whole number n , written n! , is the product of every whole number from 1 up to n . It counts the ways to…
- Factoring Trinomials CalculatorAC method (grouping) with Gauss's lemma on primitive polynomialsEnter the three coefficients of ax ² + bx + c and this calculator factors it. It pulls out the greatest common factor first…
- Factors of a Number CalculatorEnter a whole number and this calculator lists every divisor, pairs them up, and reports the two functions number theorists…
- Fibonacci Sequence CalculatorBinet's closed formEnter a term index and this calculator returns that Fibonacci number, the term immediately after it, the running sum of every…
- Fraction to Decimal CalculatorEnter a numerator and a denominator and this calculator performs the long division exactly. It reports the decimal in full —…
Industrial, Logistics & Plant Operations 4 calculators
- Fabric GSM CalculatorGrammage per ISO 3801 / ASTM D3776Fabric weight is quoted three incompatible ways — grams per square metre, ounces per square yard, and ounces per linear yard at…
- Federal Bridge Formula & Axle Weight CalculatorFederal Bridge Formula B, 23 U.S.C. § 127; FHWA Bridge Formula WeightsFederal law limits a truck three ways at once: 20,000 lb on any single axle, 34,000 lb on any tandem, 80,000 lb gross — and, on…
- Forklift Capacity Calculator (Load Center & Attachment Derate)OSHA 29 CFR 1910.178; ANSI/ITSDF B56.1 low lift and high lift trucksA forklift's nameplate capacity is only valid at the load center stamped beside it, almost always 24 inches. Push the load's…
- Freight Density & NMFC Freight Class CalculatorNMFTA National Motor Freight Classification (NMFC), density-based class bandsEnter the outside dimensions and total weight of your shipment and this calculator returns its density in pounds per cubic foot…
Automotive, Diesel & Motorsports 3 calculators
- Fuel Economy (MPG) CalculatorEPA fuel economy test procedures, 40 CFR Part 600Your trip computer is an estimate. The tank-to-tank method is a measurement: fill the tank, drive, fill it again, and divide…
- Fuel Injector Duty Cycle CalculatorMass fuel flow from BSFC; orifice flow scaling with pressureDuty cycle is the share of each engine cycle an injector spends open. Above roughly 85% an injector starts to lose its ability…
- Fuel Injector Size CalculatorBrake specific fuel consumption methodInjector sizing is a fuel-mass problem, not a horsepower problem: the engine needs a certain mass of fuel per hour to make the…
Cooking, Baking & Brewing 3 calculators
- Fermentation Salt Percentage CalculatorSalt percentage by weight (% w/w)Salt in a vegetable ferment is a dose, not a seasoning. Too little and the batch turns soft and yeasty before the lactic acid…
- Food Cost Percentage CalculatorUniform System of Accounts for Restaurants (USAR)Food cost percentage is the share of your food sales that the food itself consumed. This calculator builds it the way an…
- Food Yield Percentage CalculatorCulinary yield-test method (AP/EP)Weigh a case before you break it down, weigh what is usable afterwards, and this calculator gives you the three numbers a yield…
Crafts, Textiles, 3D Printing & Photography 3 calculators
- Fabric Cutting Layout & Pieces Per Yard CalculatorRectangular guillotine nesting on a fixed-width rollThis runs a yardage calculator backwards. Instead of asking how much fabric a project needs, it asks what a piece of fabric you…
- Fabric Shrinkage & Pre-Wash Allowance CalculatorAATCC 135 home-laundering dimensional changeWash a marked swatch, measure it again, and this calculator turns the difference into the two numbers you actually need: how…
- Fabric Yardage CalculatorCut-length nesting method (usable width after selvedge)Tell this calculator the size of your pattern piece, how many you need, and how wide your fabric is, and it works out how many…
Education, Grading & Test Scores 3 calculators
- Final Exam Grade CalculatorSyllabus weighted-average gradingEnter the grade you are carrying, the grade you want, and the share of the course the final exam is worth, and this calculator…
- Flesch Reading Ease CalculatorFlesch Reading Ease (Flesch, 1948)The Flesch Reading Ease score puts a text on a 0-to-100 scale where higher means easier. Around 70 is comfortable…
- Flesch-Kincaid Grade Level CalculatorFlesch-Kincaid Grade Level (Kincaid et al., 1975)The Flesch-Kincaid Grade Level converts two measurable properties of a text — how long its sentences run and how many syllables…
Energy, Solar, Sustainability & Environment 3 calculators
- Federal Solar Tax Credit (ITC) CalculatorIRS Form 5695 / 26 U.S.C. §25DThis calculator applies a solar tax credit to the right base, in the right order, and shows what you can actually use this…
- Flight Carbon Footprint CalculatorDistance-band passenger-km emission factors with radiative forcing upliftAviation emissions scale almost linearly with distance flown and with how much of the aircraft each passenger occupies. This…
- Fuel Energy Content (BTU) Converter CalculatorEIA higher heating values (HHV)Fuels are sold in a dozen incompatible units — cubic feet, ccf, therms, gallons, cords, tons, kilowatt-hours — and none of them…
Physics: Mechanics, Waves & Thermodynamics 3 calculators
- Final Velocity Calculator (SUVAT)Constant-acceleration (SUVAT) kinematicsEnter an initial velocity and an acceleration, then tell the calculator whether you know the time the acceleration lasts or the…
- Free Fall CalculatorConstant-acceleration kinematics with g = 9.80665 m/s² (standard gravity, NIST SP 330)Drop something from rest and gravity does the rest of the arithmetic. Give this calculator either the height it falls from or…
- Friction Force CalculatorCoulomb (Amontons) dry friction modelEnter a mass, a slope angle and the static and kinetic coefficients of friction for your material pair, and this calculator…
AI, LLM & Machine Learning Engineering 2 calculators
- F1 Score & Classification Metrics CalculatorF-measure (van Rijsbergen, 1979)Enter the four cells of a confusion matrix and this calculator returns every headline metric a model review asks for…
- Fine-Tuning vs Long-Prompt Break-Even CalculatorFixed-versus-variable cost break-even analysisFine-tuning trades a one-off training bill, and usually a higher per-token serving rate, against never sending your few-shot…
Accounting & Financial Statement Analysis 2 calculators
- FIFO Inventory & COGS CalculatorFASB ASC 330 / IAS 2FIFO costs the units you sold out of your oldest inventory layers first, which leaves the newest costs — and in a rising market…
- Free Cash Flow Calculator (FCF & FCFF)Non-GAAP measure built from ASC 230 line itemsFree cash flow is the cash a business generates after paying to keep and grow its asset base. This calculator gives all three…
Construction, Carpentry & Concrete 2 calculators
- Fence Picket, Post & Rail CalculatorIRC R105.2 permit exemptionGive this calculator the total run of your fence, the actual width of the picket and the gap you want between pickets, and it…
- Floor Joist Span & Count CalculatorAWC NDS 2018 design equations; IRC Table R301.5 loadsThis calculator answers two questions a framer asks in the same breath: how far can this joist safely span, and how many of…
Corporate Finance & Valuation 2 calculators
- Free Cash Flow to Equity (FCFE) CalculatorCFA Institute equity valuation conventionFree cash flow to equity is the cash a company could hand to its shareholders after paying every operating cost, funding the…
- Free Cash Flow to Firm (FCFF) CalculatorFCFF as defined in the CFA Institute equity valuation curriculumFree cash flow to the firm is the cash an operating business generates after tax and after the investment it needs to keep…
Home Improvement Projects & Renovation 2 calculators
- Flooring Acclimation Time CalculatorWood Handbook (FPL-GTR-190) EMC equation; NWFA installation guidanceWood flooring does not need a fixed number of days on site — it needs to reach the moisture content the room will hold it at…
- Flooring Project Cost CalculatorASTM F710 subfloor preparationA flooring quote is four numbers pretending to be one: the material you order (which is more than the room, because of waste)…
Investing & Retirement 2 calculators
- FIRE Number Calculator4% rule (Bengen 1994) / Trinity studyYour FIRE number is the portfolio value at which withdrawals cover your spending, so paid work becomes optional. It is one…
- Future Value CalculatorThis calculator solves the standard time-value-of-money future value problem in the form coursework and financial calculators…
Tax, Payroll & Insurance 2 calculators
- Federal Income Tax Withholding CalculatorIRS Publication 15-T (2025), Worksheet 1AThis calculator runs the IRS percentage method exactly as a payroll system does: it annualises your wages, applies your Form…
- FICA Payroll Tax CalculatorIRC §3101 and §3111; IRS Publication 15FICA is the pair of payroll taxes that fund Social Security and Medicare, and it is charged twice on the same wages — once to…
Unit & Measurement Conversion 2 calculators
- Feet and Inches to Centimeters Height CalculatorInternational inch, 1959 (1 in = 25.4 mm exactly)Enter a height in feet and inches and this converter returns it in centimeters, meters and total inches; switch the direction…
- Fluid Ounces to Milliliters CalculatorUS liquid gallon (231 in3) and UK Weights and Measures Act 1985 (4.54609 L gallon)There are three different fluid ounces in daily use and they are not interchangeable. The US fluid ounce is 29.5735295625 mL…