ForHosting KIT

Everything you need.
One Kit.

Hundreds of ready-made tasks — PDF, images, audio, OCR, text AI, scraping, data and more — behind a single REST API. Send a job, get a finished result by webhook. No servers, no per-model tokens, a price you can read.

REST APILive
EmailLive
Webforhosting.com/kitLive
TelegramLive
iOS & AndroidBuilding
WhatsAppComing
7554ready-made tools
6channels
1API & key
$0.002per call, from

New capabilities

Fresh in the kit — just landed.

New⚙️ Developer UtilitiesVolume to density calculatorρ=m/V from mass and volumeAabuela$0.002Open phys.volume_to_densityNew⚙️ Developer UtilitiesVoltage regulation calculator% from no-load and full-load VSsamurai$0.002Open phys.voltage_regulationNew⚙️ Developer UtilitiesVickers hardness number calculatorHV from force and diagonalPPavilion$0.002Open phys.vickers_hardness_numberNew⚙️ Developer UtilitiesVelocity calculatoraverage v = d/t in metres per secondAabuela$0.002Open phys.velocityNew⚙️ Developer UtilitiesValve flow coefficient calculatorCv from GPM, ΔP and GSsamurai$0.002Open phys.valve_flow_coefficientNew⚙️ Developer UtilitiesBarrel twist rate calculatorGreenhill formula, one turn per inchPPavilion$0.002Open phys.twist_rateNew⚙️ Developer UtilitiesTrue strain calculatorε_t = ln(1+ε) from engineering strainAabuela$0.002Open phys.true_strainNew⚙️ Developer UtilitiesTransmission coefficient calculatorpower T from η₁, η₂Ssamurai$0.002Open phys.transmissionNew⚙️ Developer UtilitiesTorsional stiffness calculatorκ = GJ/L in N·m/rad, freePPavilion$0.002Open phys.torsional_stiffnessNew⚙️ Developer UtilitiesTorsional spring calculatorκ = E d⁴ / (64 D N), N·mm/radAabuela$0.002Open phys.torsional_springNew⚙️ Developer UtilitiesToilet paper race mass moment of inertiaI = ½m(ri²+ro²)Ssamurai$0.002Open phys.toilet_paper_race_mass_moment_inertiaNew⚙️ Developer UtilitiesTime dilation calculatordilated time from proper time and velocityPPavilion$0.002Open phys.time_dilation

The full catalog

Search or filter by category. Every capability is its own endpoint with a published price.

⚙️ Developer UtilitiesFree
Percent ionic character calculator
Pauling % from ΔEN, free
Ssamurai
POST /chem/percent-ionic-character$0.002
⚙️ Developer UtilitiesFree
Net ionic equation calculator
cancel spectator ions free
PPavilion
POST /chem/net-ionic-equation$0.002
⚙️ Developer UtilitiesFree
pKa calculator
pKa = −log10(Ka) from Ka, free
Aabuela
POST /chem/pka$0.002
⚙️ Developer UtilitiesFree
Raoult's law calculator
partial pressure P = x·P° free
PPavilion
POST /chem/raoults-law$0.002
⚙️ Developer UtilitiesFree
Q10 calculator
reaction rate factor from a temperature shift
Ssamurai
POST /chem/q10$0.002
⚙️ Developer UtilitiesFree
Resuspension calculator
diluent volume from mass and concentration
Aabuela
POST /chem/resuspension$0.002
⚙️ Developer UtilitiesFree
Standard temperature and pressure calculator
V, n or P at STP
PPavilion
POST /chem/standard-temperature-and-pressure$0.002
⚙️ Developer UtilitiesFree
Titration calculator
unknown analyte concentration from C, V, ratio
Ssamurai
POST /chem/titration$0.002
⚙️ Developer UtilitiesFree
Vapor pressure calculator
Antoine equation, P in mmHg, free
Aabuela
POST /chem/vapor-pressure$0.002
⚙️ Developer UtilitiesFree
Blast radius calculator
peak overpressure distance from TNT, free
PPavilion
POST /phys/blast-radius$0.002
⚙️ Developer UtilitiesFree
Bohr model calculator
hydrogen energy and radius from n
Ssamurai
POST /phys/bohr-model$0.002
⚙️ Developer UtilitiesFree
Boost converter calculator
Vout from Vin and duty cycle, free
Aabuela
POST /phys/boost-converter$0.002
⚙️ Developer UtilitiesFree
Bridge rectifier calculator
DC voltage from AC RMS, free
PPavilion
POST /phys/bridge-rectifier$0.002
⚙️ Developer UtilitiesFree
Broad-crested weir calculator
discharge Q from width, head, gravity
Ssamurai
POST /phys/broad-crested-weir$0.002
⚙️ Developer UtilitiesFree
Column buckling calculator
Euler critical load in newtons
Aabuela
POST /phys/buckling$0.002
⚙️ Developer UtilitiesFree
Bullet energy calculator
KE = ½mv² in joules, free
PPavilion
POST /phys/bullet-energy$0.002
⚙️ Developer UtilitiesFree
Buoyancy experiment calculator
float, force, net weight
Ssamurai
POST /phys/buoyancy-experiment$0.002
⚙️ Developer UtilitiesFree
Capacitance calculator
parallel-plate C = εA/d in farads, free
Aabuela
POST /phys/capacitance$0.002
⚙️ Developer UtilitiesFree
Capacitor calculator
C = εA/d in farads, free
PPavilion
POST /phys/capacitor$0.002
⚙️ Developer UtilitiesFree
Capacitor charge time
RC time to a target voltage, free
Ssamurai
POST /phys/capacitor-charge-time$0.002
⚙️ Developer UtilitiesFree
Carburetor CFM calculator
airflow from CID, RPM and VE, free
Aabuela
POST /phys/carburetor-cfm$0.002
⚙️ Developer UtilitiesFree
Car mass center calculator
CG x, y, z from tracks and wheel loads
PPavilion
POST /phys/car-mass-center$0.002
⚙️ Developer UtilitiesFree
Centrifuge speed calculator
RPM from rotor radius and RCF
Ssamurai
POST /phys/centrifuge-speed$0.002
⚙️ Developer UtilitiesFree
Cloud base calculator
height from temperature and dew point
Aabuela
POST /phys/cloud-base$0.002
⚙️ Developer UtilitiesFree
Compton scattering calculator
wavelength shift from angle
Ssamurai
POST /phys/compton-scattering$0.002
⚙️ Developer UtilitiesFree
Compton wavelength calculator
λ = h/(m c) from rest mass
PPavilion
POST /phys/compton-wavelength$0.002
⚙️ Developer UtilitiesFree
Contact lens vertex calculator
spectacle to CL power, free
Aabuela
POST /phys/contact-lens-vertex$0.002
⚙️ Developer UtilitiesFree
Crawl ratio calculator
first gear, transfer case and axle, free
Ssamurai
POST /phys/crawl-ratio$0.002
⚙️ Developer UtilitiesFree
Crossover frequency calculator
RC filter cutoff in hertz
PPavilion
POST /phys/crossover$0.002
⚙️ Developer UtilitiesFree
Curie's law calculator
magnetization M = C H / T, free
Aabuela
POST /phys/curies-law$0.002
⚙️ Developer UtilitiesFree
Cv flow calculator
liquid GPM from Cv, ΔP and specific gravity
Ssamurai
POST /phys/cv-flow$0.002
⚙️ Developer UtilitiesFree
Cyclotron frequency calculator
f = |q|B/(2πm) in hertz
PPavilion
POST /phys/cyclotron-frequency$0.002
⚙️ Developer UtilitiesFree
Daylight hours calculator
duration from day of year and latitude
Aabuela
POST /phys/daylight$0.002
⚙️ Developer UtilitiesFree
dB gain calculator
voltage 20·log10 and power 10·log10
Ssamurai
POST /phys/db-gain$0.002
⚙️ Developer UtilitiesFree
Debye length calculator
plasma screening length in metres
PPavilion
POST /phys/debye-length$0.002
⚙️ Developer UtilitiesFree
Cylinder density calculator
ρ from mass, diameter, height
Aabuela
POST /phys/density-cylinder$0.002
⚙️ Developer UtilitiesFree
Density mass volume calculator
ρ=m/V for the missing quantity
Ssamurai
POST /phys/density-mass-volume$0.002
⚙️ Developer UtilitiesFree
Diffraction calculator
angle from slit, wavelength and order
Aabuela
POST /phys/diffraction$0.002
⚙️ Developer UtilitiesFree
Electric dipole calculator
axial field E=2kp/r³ or potential
PPavilion
POST /phys/dipole$0.002
⚙️ Developer UtilitiesFree
Displacement calculator
s=ut+0.5at² from velocity, time, acceleration
Ssamurai
POST /phys/displacement$0.002
⚙️ Developer UtilitiesFree
Drift velocity calculator
vd = I/(n·A·q) in m/s, free
Aabuela
POST /phys/drift-velocity$0.002
⚙️ Developer UtilitiesFree
Earth curvature calculator
hidden drop below the horizon
PPavilion
POST /phys/earth-curvature$0.002
⚙️ Developer UtilitiesFree
Heat exchanger effectiveness-NTU calculator
ε from NTU and C
Ssamurai
POST /phys/effectiveness-ntu$0.002
⚙️ Developer UtilitiesFree
Elastic constants calculator
E, G, K and Poisson's ratio from any two
Aabuela
POST /phys/elastic-constants$0.002
⚙️ Developer UtilitiesFree
Electric motor torque calculator
N·m from power and RPM
PPavilion
POST /phys/electric-motor-torque$0.002
⚙️ Developer UtilitiesFree
Electrical mobility
μ = vd/E from drift velocity, free
Ssamurai
POST /phys/electrical-mobility$0.002
⚙️ Developer UtilitiesFree
E=mc² calculator
rest energy from mass in joules, free
Aabuela
POST /phys/emc2$0.002
⚙️ Developer UtilitiesFree
Energy to wavelength calculator
λ = hc/E in metres
Ssamurai
POST /phys/energy-to-wavelength$0.002
⚙️ Developer UtilitiesFree
Escape velocity calculator
v = √(2GM/r) from mass and radius
PPavilion
POST /phys/escape-velocity$0.002
⚙️ Developer UtilitiesFree
Excess electrons calculator
electron count from charge, free
Aabuela
POST /phys/excess-electrons$0.002
⚙️ Developer UtilitiesFree
Exoplanet calculator
Kepler period or axis from stellar mass
Ssamurai
POST /phys/exoplanet$0.002
⚙️ Developer UtilitiesFree
Fan airflow calculator
rate from diameter and RPM
PPavilion
POST /phys/fan$0.002
⚙️ Developer UtilitiesFree
Fermi level calculator
energy from electron density, free
Aabuela
POST /phys/fermi-level$0.002
⚙️ Developer UtilitiesFree
Flow rate calculator
Q from velocity and pipe area
Ssamurai
POST /phys/flow-rate$0.002
⚙️ Developer UtilitiesFree
Foot-pounds of energy calculator
grains and fps to ft-lbf, free
PPavilion
POST /phys/foot-pounds-of-energy$0.002
⚙️ Developer UtilitiesFree
Free fall distance calculator
d = ½gt² from time, free
Aabuela
POST /phys/free-fall-distance$0.002
⚙️ Developer UtilitiesFree
Free fall height calculator
h = ½gt² from fall time, free
Ssamurai
POST /phys/free-fall-height$0.002
⚙️ Developer UtilitiesFree
Frequency of light calculator
f = c / λ in hertz, free
PPavilion
POST /phys/frequency-of-light$0.002
⚙️ Developer UtilitiesFree
Friction coefficient calculator
μ = Ff / N, kinetic or static
Aabuela
POST /phys/friction-coefficient$0.002
⚙️ Developer UtilitiesFree
Friction factor calculator
Darcy f from Re and ε/D
Ssamurai
POST /phys/friction-factor$0.002

How it works

1

Get your key

Create an account with your email and add balance when you need it. No subscription, no sales call.

2

Call the endpoint

One authenticated POST. The API returns a task_id immediately — copy-paste snippets in five languages on every page.

3

Collect the result

Receive a signed webhook the moment it's ready, or fetch a signed link. A failed task is never charged.

Pay only for what you use

No subscription. Free tools run in your browser; paid tasks draw from your balance, which never expires.

Free tools
$0.00

On-device utilities — hash, QR, JSON, Text→PDF and more — run in your browser. No account, no limits.

Balance
$10.00+

Top up your balance and spend it across web, API and the app. It never expires.