Every calculator you'll ever need

Transcribe a DNA template strand into its complementary mRNA sequence.

Solve any variable in the C1V1 = C2V2 dilution equation.

Calculate population doubling time from initial and final cell counts.

Compute allele and genotype frequencies from genotype counts.

Calculate PCR amplification efficiency from a standard-curve slope.

Convert your dog's age into human-year equivalent.

Estimate a dog or cat's body condition from weight and height.

Compute the molar mass of any chemical formula with a per-element breakdown.

Parse a formula and sum atomic weights to get molecular weight.

Solve for molarity, moles, or volume from any two known values.

Convert between pH, pOH, [H⁺], and [OH⁻].

Solve PV = nRT for pressure, volume, moles, or temperature.

Calculate reaction percent yield from actual and theoretical yield.

Find remaining quantity after decay given half-life and time.

Derive the empirical formula from percent composition of two elements.

Find an unknown concentration from titration volumes.

Estimate concrete volume and bags for a slab or footing.

Calculate how much paint you need for your walls.

Estimate the number of bricks for a wall.

Work out how many tiles you need, including waste.

Estimate volume and weight of gravel, sand, or mulch.

Calculate flooring boxes needed for a room.

Compute step count and riser/tread dimensions from total rise.

Estimate drywall sheets needed for walls and ceilings.

Convert between metric and imperial length units.

Convert grams, kilograms, ounces, pounds, and stone.

Convert ml, l, tsp, tbsp, cup, fl oz, and gallon.

Convert m², hectare, acre, ft², and yd².

Convert km/h, mph, knots, and m/s.

Convert Pa, kPa, bar, psi, atm, and mmHg.

Convert bits, bytes, KB, MB, GB, and TB.

Convert between Celsius, Fahrenheit, and Kelvin.

Convert numbers to Roman numerals and back.

Convert a value between binary, octal, decimal, and hexadecimal.

Convert between major world currencies with live exchange rates (incl. LKR).

Compare current time across two cities and see the difference.

Estimate your annual CO₂ output from travel, energy, and diet.

Estimate CO₂ emissions per passenger for a flight.

Estimate your daily water use from common habits.

Estimate panels needed and rough payback for your usage.

Estimate annual CO₂ absorbed by trees.

Find your exact age in years, months, and days.

Count the days, weeks, and months between two dates.

Split the bill and tip evenly among your group.

Estimate the fuel cost of a trip.

Generate strong, random passwords with custom options.

Pick a random number in a range or a random item from a list.

See a live countdown to any future date.

Calculate your monthly loan payment (EMI) and total interest.

Project the future value of savings with compound interest.