New Calculators

Calculate the magnetic flux (Φ = B × A) in webers for a magnetic field perpendicular to a flat surface, from the field strength and the area.

Calculate the magnetic force (F = BIL) in newtons on a current-carrying wire in a magnetic field from the field strength, current, and wire length.

Calculate the linear magnification (m = image height / object height) and its percentage from an image and object measured in the same unit.

Convert a battery capacity in mAh to energy in watt-hours (Wh = mAh × V / 1000) and kilowatt-hours using the pack voltage.

Calculate the mass flow rate (ṁ = ρ·A·v) in kg/s and the volumetric flow rate of a fluid from its density, cross-sectional area, and velocity.

Calculate the megapixels of an image sensor or photo from its pixel width and height (MP = width × height / 1,000,000).

Calculate the enzyme reaction velocity v = (Vmax × [S]) / (Km + [S]) in µmol/min from Vmax, the Michaelis constant Km, and the substrate concentration.

Calculate a mod n — the remainder after dividing the dividend by the divisor — plus the integer quotient, using the floored modulo definition.

Calculate molality (b = moles of solute divided by kilograms of solvent) in mol/kg from the moles of solute and the mass of the solvent.

Calculate the mole fraction of each component in a two-part mixture from the amount in moles — x_A = nA / (nA + nB), with both fractions summing to 1.

Convert a mass into the amount of substance (n = m / M) in moles and the number of molecules from the mass and molar mass.

Calculate the moment of inertia (I = m·r²) of a point mass about an axis of rotation in kg·m² from its mass and its distance from the axis.

Calculate the linear momentum (p = mv) in kg·m/s and the kinetic energy of a moving object from its mass and velocity.

Calculate the output frequency, duty cycle, and high/low times of a 555 timer in astable mode from R1, R2, and the timing capacitor — f = 1.44 / ((R1 + 2·R2) × C).

Calculate the output pulse width of a 555 timer in monostable (one-shot) mode from its timing resistor and capacitor — T = 1.1 × R × C.

Calculate the nth root of a number, ⁿ√x = x^(1/n), from the radicand and the degree — square roots, cube roots, and any higher root.

Calculate the area, perimeter, apothem, and circumradius of a regular octagon from its side length — area = 2(1+√2)s², perimeter = 8s, apothem = ((1+√2)/2)s, circumradius = (√(4+2√2)/2)s.

Calculate the volume, cross-section area, and surface area of a regular octagonal prism from the side length and prism length — volume = 2(1+√2)·s²·L.

Calculate the odds ratio (OR) from a 2×2 contingency table — OR = (a × d) ÷ (b × c) — to compare the odds of an outcome between two groups.

Convert odds such as 1 to 4 into a probability instantly. This odds to probability calculator returns both a percentage and a decimal probability value.

Calculate the orbital period (Kepler's third law, T = 2π·√(a³/GM)) in seconds and days from the semi-major axis and the central mass.

Calculate the circular orbital velocity (v = √(GM/r)) in m/s and km/s of a body orbiting a central mass from the mass and orbital radius.

Calculate the volumetric flow rate through a sharp-edged orifice — Q = Cd·A·√(2gh). The discharge coefficient Cd (~0.62) accounts for the vena contracta.

Calculate the osmotic pressure (Π = iMRT) in atmospheres and kilopascals of a solution from the van 't Hoff factor, the molar concentration, and the temperature.

Convert oven temperatures between Celsius, Fahrenheit, and gas marks — the three labelling systems found on ovens and recipes worldwide.

Calculate the distance to a star in parsecs and light-years from its annual parallax angle in arcseconds, using d = 1 / p.

Calculate the moment of inertia about a parallel axis with the parallel axis theorem: I = I_cm + m·d² in kg·m².

Calculate the equivalent inductance of two inductors in parallel, L_eq = (L1·L2)/(L1+L2), in henries from the two coil inductances.

Calculate the capacitance of a parallel-plate capacitor from its plate area, plate separation, and dielectric constant — C = ε₀ × εr × A / d.

Calculate the partial pressure of a gas using Dalton's law (P_i = mole fraction × total pressure) in kilopascals.

Calculate the output force of a hydraulic press with Pascal's principle (F2 = F1 × A2 / A1) from the input force and the two piston areas.

Calculate password entropy in bits (E = L × log₂R) from your password length and character pool size, and see the strength band it lands in.

Calculate the area, perimeter, apothem, and circumradius of a regular pentagon from its side length — area = ¼√(5(5+2√5))s², perimeter = 5s, apothem = s/(2·tan36°), circumradius = s/(2·sin36°).

Calculate the volume, cross-section area, and surface area of a regular pentagonal prism from the side length and prism length — volume = ¼√(5(5+2√5))·s²·L.

Calculate the percent yield of a chemical reaction from the actual yield and the theoretical yield predicted by stoichiometry.

Calculate the number of ordered selections n^r — how many arrangements of r positions you can make from n distinct items when items may repeat.

Calculate the pH (pH = −log₁₀([H⁺])) of an aqueous solution from its hydrogen-ion concentration, plus the matching pOH.

Calculate the energy of a photon (E = h·c / λ) in electronvolts and joules from its wavelength using the Planck–Einstein relation.

Calculate the momentum of a photon (p = h / λ) in kg·m/s from its wavelength in nanometres, using the Planck constant.

Work out how many pizzas to order for a group: pizzas = round-up of (people × slices per person) ÷ slices per pizza, so nobody at your party goes hungry.

Calculate the Poisson probability P(k; λ) = (λ^k × e^(−λ)) / k! of exactly k events in a fixed interval from the average rate λ.

Calculate each interior angle of a regular polygon ((n − 2)·180 / n) and the sum of all interior angles ((n − 2)·180) from the number of sides.

Calculate the power dissipated by a resistor (P = I²R) in watts and the voltage drop across it from the current and resistance.

Calculate the power factor, phase angle, and reactive power of an AC circuit from its real and apparent power — PF = P / S, φ = arccos(P / S), Q = √(S² − P²).

Calculate parts per million (ppm = mass of solute ÷ mass of solution × 1,000,000) and the equivalent percentage from a solute mass and a solution mass.

Calculate the probability of the union of two events with the addition rule, P(A∪B) = P(A) + P(B) − P(A∩B).

Calculate the maximum height of a projectile (h = v²·sin²θ / 2g) from its initial velocity and launch angle, ignoring air resistance.

Calculate the horizontal range of a projectile on level ground (R = v² × sin(2θ) / g) from its launch speed and angle, ignoring air resistance.

Calculate the time of flight, horizontal range, and maximum height of a projectile launched from ground level — time = 2v·sinθ/g, range = v²·sin(2θ)/g, height = v²·sin²θ/(2g).

Calculate the volume, lateral surface, and total surface area of a square pyramid frustum from its bottom side, top side, and height — volume = (h/3)(a² + ab + b²).