Free online showcase.categorylabels.science-and-engineering calculators and tools. Browse and use all showcase.categoryLabels.science-and-engineering tools on Calciverse.
Simple: ABV ≈ (OG − FG) × 131.25 (OG/FG as specific gravity)
a = Δv / Δt — enter two to find the third
Air density calculator: moist-air density from temperature, pressure (inHg or hPa), and relative humidity or dew point.
Alkalinity as mg/L CaCO₃ from titrant volume and normality
All-in-one atmospheric calculator: dew point, humidity, heat index, wind chill, LCL, wet bulb, air density, and density …
Scale recipe by factor: new amount = base amount × scale
Simply supported beam with center point load or uniform load → max deflection
pH = pKa + log₁₀([A⁻]/[HA])
F_b = ρ_fluid × V × g — buoyant force on submerged volume
Decode capacitor codes and convert to capacitance value.
F = mv²/r (or F = mω²r) — force for circular motion
Dose (mg/L or g/L) from target concentration and volume
Mass or volume of chlorine needed for target ppm (e.g. pool)
Coffee-to-water ratio for pour-over, French press, and drip.
dB to power/voltage ratio and back
Mass, volume, density — enter two to find the third
Density altitude calculator from pressure altitude or station pressure plus sea-level pressure and outside air temperatu…
Dew point calculator: convert between dew point, relative humidity, and temperature in °F or °C using a Magnus–Tetens va…
Enter three of concentration/volume to find the fourth
η = (useful output / input) × 100%
Mass deposited: m = (I × t × M) / (n × F); I=current (A), t=time (s), M=molar mass, n=electrons per ion
θe calculator: approximate equivalent potential temperature from temperature, humidity, and pressure for meteorology stu…
Q = n_e × F; charge from moles of electrons (F ≈ 96485 C/mol)
Budget loss and margin for fiber links and splices.
Find flow velocity from flow rate and pipe size.
Pipe diameter with either flow rate or velocity → solve the other
Force, mass, acceleration — enter two to find the third
Time, velocity, and height — enter two to find the third (g = 9.81 m/s²)
F_f = μ × N — sliding friction
Estimate time until cylinder empty at given flow rate (simplified: ideal gas)
ρ = PM / (RT) — density from pressure, molar mass, temperature
Estimate gas pressure drop in pipes for sizing.
Heat index calculator from air temperature and humidity. Uses NWS-style regression in the warm band with conservative in…
Q = mcΔT — heat to change temperature
P = ρgh — pressure at depth (liquid)
Enter three of P, V, n, T to find the fourth. R = 0.08206 L·atm/(mol·K)
Common shapes (rectangle, circle, hollow circle) → second moment of area
KE = ½mv² — enter two to find the third
LCL calculator: estimate lifting condensation level (cloud base height) in feet and meters from surface temperature and …
Lightning distance calculator from flash-to-bang time using speed of sound; miles, km, feet, and meters.
Compare moles / stoichiometric coefficient to find limiting reactant and theoretical yield
Mass of solute / total mass × 100
Mixing ratio calculator from temperature, relative humidity, and pressure in inHg or hPa.
Molarity (M), moles, volume — enter two to find the third
n = m / M (moles = mass / molar mass)
Density from molar mass and molarity (ρ ≈ M × C for dilute aqueous; or enter mass/volume)
Sum atomic masses from chemical formula (e.g. H2O, CaCO3)
p = mv — enter two to find the third
Count arrangements and combinations with formulas and examples for probability and combinatorics.
pH = −log₁₀[H⁺]; enter [H⁺] in mol/L
Amount of strong acid/base to add to reach target pH (simplified: pure water or buffer)
PE = mgh — enter two to find the third (g = 9.81 m/s²)
Parts per million or billion from mass or concentration
Pressure altitude calculator from station pressure and sea-level / altimeter setting (ISA hypsometric).
Initial speed and launch angle → range, max height, flight time (g = 9.81 m/s²)
Psychrometric summary: dew point, mixing ratio, vapor pressures, wet bulb, virtual temperature, θ and θe in one table.
Purity % = (pure mass / total mass) × 100
Solve linear and quadratic equations with step-by-step solutions and discriminant analysis for algebra and exams.
Read and decode resistor color bands for value and tolerance.
Compute Reynolds number for flow regime and friction.
Compute cable and connector loss for RF and fiber.
Mix two solutions to get final concentration
SG = ρ / ρ_ref (default ρ_ref = 1000 kg/m³ for water)
Reaction distance + braking distance = total stopping distance
Force and area → stress; length change → strain and approximate modulus
Brix ≈ Plato for dilute solutions; % sucrose by mass
Length, coefficient, and temperature change → change in length and new length
Vapor pressure calculator: saturation from temperature, actual from RH, or from dew point (Magnus–Tetens).
Virtual temperature calculator from dry-bulb, relative humidity, and pressure (moist-air ideal gas).
Convert Ca²⁺ and Mg²⁺ to mg/L as CaCO₃ equivalent
v = f × λ — speed, frequency, wavelength (enter two to find the third)
W = m × g (default g = 9.81 m/s²)
Wet-bulb temperature calculator from dry-bulb, relative humidity, and station pressure using a standard psychrometric so…
Wind chill calculator using the NWS 2001 formula where applicable, with mph wind speed and °F/°C air temperature.
W = F × d (force along displacement) — enter two to find the third
Percent yield = (actual / theoretical) × 100