Everyday calculators
Free professional everyday calculators with verified formulas and step-by-step solutions.
Test Grade Calculator
Enter total questions and wrong answers to calculate your test percentage, letter grade, and GPA. Supports US standard (A-F) and plus/minus …
OpenTip Calculator
Bill, tip percentage, split between any number of people. Choose tip on pre-tax or post-tax amount. Returns tip dollars, total, and per-pers…
OpenMinecraft Circle Generator
Generate Minecraft circles and rings of any diameter. The chart shows exactly which blocks to place, using the same midpoint algorithm Brese…
OpenDownload Time Calculator
Estimate how long a file takes to download from its size and your connection speed. Size in KB, MB, GB, or TB. Speed in Mbps (what ISPs adve…
OpenDesk Height Calculator
Calculate the right desk height, chair seat height, eye level, monitor top, and standing desk height from your body height. Built on the pub…
OpenDress Size Calculator
Convert your bust, waist, and hip measurements into a dress size in US, UK, EU, and Australian sizing. The dress size calculator uses the AS…
OpenAquarium Volume Calculator
Compute aquarium volume for rectangular, cylindrical, or bow-front tanks. Outputs US gallons, UK gallons, liters, and water weight in both p…
OpenFlag Calculator
Compute flag dimensions and US flag proportions. Enter hoist or fly with a chosen aspect ratio (10:19 government, 2:3 residential, 1:2 UK st…
OpenSpeed Calculator
Solve for any of speed, distance, or time given the other two values. Handles every common unit: mph, km/h, m/s, knots, miles, kilometers, h…
OpenMPG Calculator
Compute MPG from a trip's miles and gallons, plus the metric equivalents (L/100km and km/L) and the dollar cost. Defaults to the US gallon (…
OpenBinary to Text Converter
Two-way binary to text converter. Decode 8-bit binary into ASCII or UTF-8 text, or encode any text into binary. Accepts space, comma, or no …
OpenDrive Time Calculator
Calculate how long a drive will take from distance and average speed. Toggle miles or kilometers, mph or km/h. Adds fuel cost based on price…
OpenFinal Grade Calculator
Find out exactly what score you need on the final exam to hit your target class grade. Enter your current grade, the final’s weight, a…
OpenUncooked to Cooked Rice Calculator
Uncooked-to-cooked rice conversion across seven varieties. Pick the rice type, enter cups uncooked or cooked, get the other. USDA expansion …
OpenFuel Cost Calculator
Estimate the fuel cost of a trip from three inputs: distance, fuel efficiency, and price per gallon (or per liter). The calculator returns t…
OpenYeast Converter
Yeast type converter: switch between fresh cake yeast, active dry yeast, and instant yeast at the correct ratio. 1 g fresh = 0.4 g active dr…
OpenK/D Ratio Calculator
Compute kill/death ratio (K/D) or KDA from your match stats. Get a tier label (Below Average / Average / Good / Very Good) and game-by-game …
OpenDilution Ratio Calculator
Dilution ratio calculator. Enter a 1:N ratio with the volume you need, or the volume you have, and get the exact concentrate plus water plus…
OpenElectricity Cost Calculator
Calculate the electricity cost of any appliance from wattage and hours of use. Pre-loaded with US state average rates from EIA Electric Powe…
OpenUnit Price Calculator
Compare 2, 3, or 4 grocery items side by side. Enter the total price, quantity, and unit (oz, lb, g, kg, fl oz, gal, qt, ml, L, or each) for…
OpenGrade Curve Calculator
Apply a grade curve to raw test scores using five methods: flat point addition, linear scaling to a target average, square root curve, propo…
OpenGrade Calculator
Compute a weighted course grade from a list of categories - homework, quizzes, tests, projects, final. Enter each score and its weight; the …
OpenJeans Size Calculator
Convert waist plus inseam measurements into the US men's W × L label, the women's numeric size, and the European and UK equivalent…
OpenFuel Consumption Calculator
Compute fuel consumption from distance driven and fuel used. Results in L/100km, MPG, km/L plus trip cost and CO2 emissions. EPA conversion …
OpenSemester Grade Calculator
Compute a semester grade from quarter scores and the final exam. Defaults to the common 40 · 40 · 20 weighting (Q1 40%, Q2 40%, Final 20%); …
OpenNether Portal Calculator
Calculate where to build your Minecraft Nether portal. The Overworld-to-Nether ratio is 8:1 on X and Z (Y is preserved), so 800 blocks in th…
OpenPrice per Ounce Calculator
Compare up to four items by price per ounce. Switch between weight oz (solids) and fluid oz (liquids). Shows the best deal and per-pound or …
OpenSunscreen Calculator
Estimate how long you can safely stay in the sun for your skin type, SPF, and UV index. Shows reapplication schedule, protection percentage,…
OpenEU to US Shoe Size Converter
Convert European (Paris-point) shoe sizes to US, UK, and centimetre foot length, or go the other way. Charts are aligned with ISO 19407:2023…
OpenLetters to Numbers Converter
Convert any text into numbers using three classical schemes. A1Z26 maps A=1 through Z=26, the simplest substitution cipher used in puzzles a…
OpenRain to Snow Calculator
Estimate how much snow a given amount of rain becomes, based on air temperature. Uses NOAA / National Weather Service snow:water ratio bands…
OpenPizza Party Calculator
Plan your pizza order in seconds. The pizza party calculator uses the classic 3 slices per adult and 2 per kid rule, scaled by hunger level …
OpenPrice Per Unit Calculator
Compare the price per unit across multiple products even when sizes and units differ. The price per unit calculator accepts grams, kilograms…
OpenScreen Size Calculator
Compute width, height, area, and pixel density from a screen diagonal and aspect ratio. Supports 16:9, 16:10, 21:9, 4:3, 3:2, and custom asp…
OpenLinear Inches Calculator
Calculate the linear inches of any bag by adding length plus width plus height. Includes airline compliance check against the standard 62 li…
OpenBold Text Generator
Generate Unicode bold text along with italic, bold italic, sans-serif bold, monospace, script, fraktur, and double-struck variants. Uses rea…
OpenMoney Weight Calculator
Calculate the weight of cash in pounds, kilograms, or grams. Works for any US bill ($1 through $100) or coin (penny, nickel, dime, quarter, …
OpenGPA Calculator
GPA calculator using the College Board 4.0 scale. Enter each course as letter grade and credit hours; the calculator weights by credit and r…
OpenUpside Down Text Generator
Generate upside-down text by mapping Latin letters, digits, and punctuation to their rotated Unicode equivalents from the International Phon…
OpenNautical Mile Calculator
Convert nautical miles to kilometers (exact 1.852), statute miles (1.15078), meters or feet. Pick the target unit and the converter works in…
Open16:9 Aspect Ratio Calculator
Given one dimension at 16:9, get the matching width, height, diagonal, and area. The widget compares the same long side under 4:3, 21:9, 1:1…
OpenCompression Ratio Calculator
Enter the original and compressed file sizes to compute the compression ratio (X:1 form) and percentage of space saved. Useful for ZIP, JPEG…
OpenAudiobook Speed Calculator
Enter audiobook length and playback speed. The calculator shows your actual listening time, time saved, and effective words per minute at sp…
OpenMicrowave Wattage Time
Adjust microwave cooking time when your microwave wattage differs from the recipe. Set recipe wattage, your wattage, original time, and powe…
OpenPrice Per Pound Calculator
Compare 2-4 items by price per pound. Find the cheapest option, see savings per pound, and convert to per-ounce or per-kilogram for internat…
OpenRPM Calculator: Revolutions per Minute
RPM (revolutions per minute) calculator. Compute RPM from a number of revolutions over a time interval, or convert angular velocity to RPM. …
OpenTV Mounting Height
Calculate the right TV mounting height for your room. Enter TV size, seating distance, and seated eye level to get the recommended center, t…
OpenWords Per Minute (WPM)
Calculate your words per minute (WPM) for typing, reading, or speaking. Enter word count and elapsed time to see your speed against benchmar…
OpenData Transfer Time
Calculate data transfer time for uploads, cloud backups, and network transfers. Enter file size, bandwidth, and real-world overhead to get d…
OpenPoker Odds Calculator
Calculate Texas Hold'em poker equity from your outs, plus pot odds and a profitability verdict. Uses the Rule of 2 and 4 alongside exact com…
Open0-60 Calculator
Estimate a car 0-60 mph time using the empirical formula t = 0.45 × (weight/HP) + 1.5, adjusted for drivetrain. Or back-solve from a measure…
OpeneDPI Calculator (Effective DPI for Gaming)
eDPI = mouse DPI × in-game sensitivity. Enter both values and the calculator returns your effective DPI plus the centimeters needed to do a …
OpenFabric Calculator
Estimate fabric yardage for sewing projects. Inputs: project length and width, fabric bolt width, pattern repeat, seam allowance, shrinkage,…
OpenHair Growth Calculator
Estimate how long it takes to grow hair from current length to a target. Three preset growth rates (slow 0.25, average 0.5, fast 0.75 in/mon…
OpenLatitude Longitude Distance Calculator
Calculate distance between two latitude and longitude coordinates with the Haversine formula. Inputs: decimal latitude and longitude for two…
OpenRing Size Converter (CM to MM, US, UK, EU, JP)
Enter ring inside diameter, circumference, or US size and read the equivalent in every international system. Built on the ISO 8653:2016 Euro…
OpenD&D 5e Point Buy Calculator (27 Points)
Allocate 27 points across six D&D 5e ability scores from 8 to 15. The cost rises non-linearly (8 to 13 each cost one more point, 14 costs tw…
OpenGas Calculator (Trip Cost)
Calculate the cost of gas for any road trip. Enter distance (miles or km), MPG, and price per gallon to see gallons consumed, total cost, co…
OpenMinecraft Stack Calculator
Convert any item total into Minecraft stacks, full chests, double chests, and shulker boxes. Defaults to the standard 64 per stack. Switch t…
OpenPool Salt Calculator
Calculate the salt you need to bring a pool to its target salinity. Inputs: pool volume in gallons (or length, width, average depth), curren…
OpenCord of Wood Calculator
Convert a firewood stack (length x height x depth in feet) into cords, face cords, weight, and BTU heat output. Uses USDA Forest Service def…
OpenResolution Scale Calculator
Calculate render resolution from native resolution and a scale factor (DLSS, FSR, XeSS modes). Or reverse: enter target render resolution, g…
OpenEngine Hours to Miles Converter
Convert engine operating hours to equivalent miles by equipment type. Uses typical duty-cycle speeds drawn from SAE J1100 reference cycles: …
OpenGarlic Converter
Convert garlic between fresh cloves, minced teaspoons, garlic powder, granulated garlic, garlic paste, flakes, grams, and whole bulbs. Based…
OpenPixels Per Inch (PPI) Calculator
Compute the pixel density (PPI) of any display from its pixel resolution and diagonal size. Returns PPI, pixels per centimeter, pixel pitch,…
OpenUS to UK Shoe Size Converter
Convert US shoe sizes to UK, EU, and foot length in centimeters. Sex toggle for men, women, and kids tables. References ISO 9407 Mondopoint …
OpenCrosswind Calculator
Computes crosswind = wind speed × sin(angle) and headwind = wind speed × cos(angle). Aviation reference with crosswind limits for Cessna 172…
OpenHit Points Calculator (D&D 5e)
D&D 5e hit points calculator. Select a class, level, Constitution score, and method (average or max rolls). Returns total HP, hit dice p…
OpenKeystrokes Per Hour Calculator
Compute keystrokes per hour from a typing sample, or convert KSPH to words per minute. Uses the standard 5 characters per word, the same con…
OpenNumbers to Letters Converter
Decode the A1Z26 cipher (A=1, B=2, ..., Z=26) or its reverse (Z=1, A=26). Convert 8 5 12 12 15 to HELLO instantly. Two-way encoder, useful f…
OpenDimensional Weight Calculator
Dimensional weight calculator using the standard L x W x H / divisor formula. Compares actual weight against DIM weight and returns the bill…
OpenPizza Comparison Calculator
Compare two pizzas by price per square inch to find the better value. Works with any diameters and prices, in inches or centimeters and four…
OpenShoe Size Conversion Calculator
Convert any shoe size between US, UK, EU (Paris Point), and Japan/Mondopoint cm. Built on Brannock and ISO 9407 with separate men's and wome…
OpenCurtain Size Calculator
Find the correct curtain width and length for any window. Choose fullness (1.5×–3×), inside or outside mount, and four com…
OpenFuel Mileage Calculator
Fuel mileage calculator that takes distance driven and fuel used, and returns MPG (US), MPG (UK), L/100km, and km/L. Supports miles or kilom…
OpenTaco Bar Calculator
Taco bar calculator that sizes a taco buffet for adults plus kids. Returns tortillas, meat, rice, beans, cheese, lettuce, tomato, onion, sou…
OpenOil to Butter Converter
Substitute oil for butter (and back) in any recipe using the standard 1 cup butter to 3/4 cup oil ratio. Bidirectional with cup, tablespoon,…
OpenMiles Per Year Calculator
Calculate yearly mileage for car insurance, lease tier selection, or used-car valuation. Two modes: commute breakdown (daily miles plus week…
OpenBattery Life Calculator
A battery life calculator that converts capacity and current draw into expected runtime in hours, minutes, and days. Inputs in mAh, Wh, mA, …
OpenInches to Ring Size Converter
An inches-to-ring-size converter for jewelry sizing. Enter inside diameter or circumference in inches and get matching US, UK, EU (ISO 8653)…
OpenReading Time Calculator
Reading time calculator. Paste text or enter word count, pick a WPM, get the estimated minutes. Compares slow (200), average (238), fast (30…
OpenVocal Range Calculator
Calculate vocal range from lowest and highest notes in scientific pitch notation. Outputs octaves, semitones, frequencies, and voice type us…
OpenNo calculators match .