Ultimate Calculator

Add, subtract, multiply, divide

Ratio, change, and percentage

Dutch pay and custom shares

Add, subtract, multiply, divide

Ratio, change, and percentage

Average, sum, and median

Calculate sample or population standard deviation and variance

Length, weight, temp, volume, area

Solve A:B = C:? unknowns

Calculate greatest common divisor, least common multiple, and reduced ratios

Calculate prime factors, prime status, and divisor count for an integer

Calculate nPr, nCr, and factorials as exact integers

Trig, log, exponent calculations

Calculate area and perimeter for circles, rectangles, and triangles

D-day, date difference, add days

Calculate 100-day milestones, yearly anniversaries, and days left

Age, Korean age, and next birthday

Workdays excluding selected weekends

Calculate a project deadline from business days or calendar days

Find the next payday, days left, and weekend adjustments

Add times, difference, unit convert

Convert date and time between fixed UTC offsets

Calculate arrival time or required speed from distance and departure time

Calculate parking cost from entry, exit, and a fee table

Investment growth simulation

Interest, maturity, and target savings

Time to goal and required monthly savings

Estimate target fund, coverage months, and time to target

Calculate surplus, spending rate, and savings rate from income and expenses

Calculate net worth, debt ratio, and liquidity share from assets and debts

Estimate required nest egg, shortfall, and monthly savings

Calculate monthly payout, required fund, and how long it lasts

Hourly, monthly, and annual gross pay

Margin rate, markup, reverse price

Fees, payout, and required gross sales

Net amount, tax, and total

Fixed costs, units, and required sales

Ad spend, revenue, CPA, and break-even ROAS

Calculate CTR, CPC, CPM, CVR, and CPA

Body mass index, healthy weight range

Estimate body fat percentage from circumference measurements

Maintenance calories, targets, and macros

Estimate timeline and daily calorie adjustment to reach a target weight

Daily protein target and meal split

Daily water target by weight and activity

Suggested bedtimes and wake times by sleep cycles

Estimate due date and gestational age from last period, conception, or due date

Estimate ovulation date, fertile window, and next period from cycle length

Calculate voltage, current, resistance, and power

Calculate capacitor Xc, inductor Xl, impedance, and phase angle

Calculate resistance and tolerance from 4-band or 5-band codes

Calculate series resistor values from supply voltage, LED voltage, and current

Calculate divider output and target resistor values with optional load

Calculate RC time constant, charge time, and discharge time

Convert markings like 104 and 473 into pF, nF, and µF

Calculate astable frequency and monostable pulse width

Calculate LM317 output voltage, target resistor values, and minimum input voltage

Calculate series resistor and zener power from zener voltage and load current

Calculate inverting and non-inverting amplifier gain and output voltage

Monthly payment, total interest

Compare new rate, fees, monthly savings, and break-even period

Estimate debt-free date or required monthly payment

Estimate affordable home price from income, debts, DTI, and down payment

Compare net cost of renting and buying over a period

Convert between rent deposit and monthly rent using a rate

CAGR, target amount, capital needed

Average buy price and unrealized P/L

Yield, after-tax dividends, target income

Purchasing power, real value change

14 major currencies

Calculate foreign-currency profit from buy and sell rates

Dutch pay and custom shares

Tip, tax, total, and per-person amount

Sale price, discount rate, stacking

Compare price by size or quantity

Compare monthly and annual subscription costs

Calculate next billing date and expiry from start date, cycle, and trial period

Compare cash price and installment total cost

Convert Korea, US, UK, EU, and Japan sizes

Convert tops and bottoms across Korea, US, UK, and EU sizes

Convert pyeong and square meters

Wall area, paint liters, and cans to buy

Wallpaper rolls, install area, and estimated cost

Tiles needed, boxes to buy, and estimated cost

Pour volume, bags to buy, and estimated cost

Estimate electricity cost from usage, rate, base fee, and taxes

Trip fuel cost, cost per km, and measured efficiency

Scale ingredients by serving count

Convert cups, spoons, ml, and grams

Pace, finish time, distance

Training bpm zones from age and resting heart rate

Estimate calories burned by activity, weight, and duration

Total training volume by sets, reps, and weight

Estimate max strength and training loads

Convert KB, MB, GB, TB, and bits

Convert km/h, m/s, mph, knots, and running pace

Estimate download or upload time from file size and transfer speed

Pixel size, aspect ratio, and resize dimensions

Screen size, resolution, and pixel density

Pixels, DPI, print dimensions, and required resolution

Runtime from Wh, mAh, voltage, and load

Course credits, grades, and GPA

Find the final exam score needed to hit a target course grade

Characters, words, and reading time

Estimate speech length from script, words, or target time

Build and save your own formulas