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
Horizon dip angle calculator from observer height
Kkatherine
POST /geo/horizon-dip-angle$0.002
⚙️ Developer UtilitiesFree
Turn anticipation distance calculator
radius and course change
Kkatherine
POST /geo/turn-anticipation-distance$0.002
⚙️ Developer UtilitiesFree
Distance from Angle and Height Calculator
Kkatherine
POST /geo/distance-from-angle-height$0.002
⚙️ Developer UtilitiesFree
Vertical exaggeration factor calculator for terrain profiles
Bbarbara
POST /geo/vertical-exaggeration$0.002
⚙️ Developer UtilitiesFree
Viewshed point visibility test over a terrain profile
Bbarbara
POST /geo/viewshed-point-test$0.002
⚙️ Developer UtilitiesFree
Fishnet grid from bounding box
generate regular cell bounds
Kkatherine
POST /geo/grid-from-bbox$0.002
⚙️ Developer UtilitiesFree
Total pairwise distance calculator for latitude and longitude points
Bbarbara
POST /geo/total-pairwise-distance$0.002
⚙️ Developer UtilitiesFree
Great-circle equator crossing longitude and bearing calculator
Kkatherine
POST /geo/great-circle-equator-crossing$0.002
⚙️ Developer UtilitiesFree
Isometric latitude calculator
ellipsoidal Mercator coordinate
Bbarbara
POST /geo/isometric-latitude$0.002
⚙️ Developer UtilitiesFree
Geometric median calculator
find the median center of points
Kkatherine
POST /geo/median-center$0.002
⚙️ Developer UtilitiesFree
Snap a latitude and longitude coordinate to a grid
Bbarbara
POST /geo/snap-to-grid$0.002
⚙️ Developer UtilitiesFree
16-point compass to bearing
direction name to degrees
Bbarbara
POST /geo/cardinal16-to-bearing$0.002
⚙️ Developer UtilitiesFree
Eckert VI projection calculator
latitude and longitude to x, y
Bbarbara
POST /geo/eckert-vi-project$0.002
⚙️ Developer UtilitiesFree
Frequency from angular frequency calculator
ω to Hz
Kkatherine
POST /optics/frequency-from-angular-frequency$0.002
⚙️ Developer UtilitiesFree
Transverse wave maximum particle acceleration calculator
Bbarbara
POST /optics/transverse-max-particle-acceleration$0.002
⚙️ Developer UtilitiesFree
Closed pipe harmonic frequency calculator
odd harmonics
Kkatherine
POST /optics/closed-pipe-harmonic$0.002
⚙️ Developer UtilitiesFree
Standing Wave Nodes Count Calculator for Fixed Ends
Bbarbara
POST /optics/standing-wave-nodes-count$0.002
⚙️ Developer UtilitiesFree
Wave Power Transmittance Calculator from Impedances
Bbarbara
POST /optics/wave-power-transmittance$0.002
⚙️ Developer UtilitiesFree
Wavelength from frequency and wave speed calculator
Kkatherine
POST /optics/wavelength-from-frequency-speed$0.002
⚙️ Developer UtilitiesFree
Sound intensity level calculator
10 log10(I/I0)
Bbarbara
POST /optics/sound-intensity-level-from-intensity$0.002
⚙️ Developer UtilitiesFree
Sound Power from Intensity and Area Calculator
P = I × A
Kkatherine
POST /optics/sound-power-from-intensity$0.002
⚙️ Developer UtilitiesFree
Speed of sound in solid calculator
Young modulus and density
Kkatherine
POST /optics/speed-of-sound-in-solid$0.002
⚙️ Developer UtilitiesFree
String harmonic series list calculator from fundamental frequency
Bbarbara
POST /optics/string-harmonic-series-list$0.002
⚙️ Developer UtilitiesFree
Acoustic pressure from intensity calculator
RMS plane-wave pressure
Bbarbara
POST /optics/acoustic-pressure-from-intensity$0.002
⚙️ Developer UtilitiesFree
Sabine Reverberation Time Calculator
Calculate RT60
Kkatherine
POST /optics/sabine-reverberation-time$0.002
⚙️ Developer UtilitiesFree
Direct proportion calculator
find the constant and matching value
Bbarbara
POST /algebra/direct-proportion$0.002
⚙️ Developer UtilitiesFree
Frequency to MIDI note number calculator
convert hertz to MIDI
Bbarbara
POST /optics/frequency-to-midi-note$0.002
⚙️ Developer UtilitiesFree
Room Volume from Reverberation Time Calculator
Inverted Sabine Equation
Kkatherine
POST /optics/room-volume-from-rt60$0.002
⚙️ Developer UtilitiesFree
Equal temperament note frequency calculator
semitone offset to Hz
Kkatherine
POST /optics/equal-temperament-frequency$0.002
⚙️ Developer UtilitiesFree
Thin lens image distance calculator
solve image distance
Kkatherine
POST /optics/image-distance-thin-lens$0.002
⚙️ Developer UtilitiesFree
Telescope exit pupil calculator
aperture divided by magnification
Bbarbara
POST /optics/telescope-exit-pupil$0.002
⚙️ Developer UtilitiesFree
Thick lens focal length calculator
index, radii and thickness
Kkatherine
POST /optics/thick-lens-focal-length$0.002
⚙️ Developer UtilitiesFree
Two-lens system image position calculator
Bbarbara
POST /optics/two-lens-system-image$0.002
⚙️ Developer UtilitiesFree
Depth of field far limit calculator
Bbarbara
POST /optics/depth-of-field-far$0.002
⚙️ Developer UtilitiesFree
Incidence angle from Snell's law calculator
solve from refraction angle
Kkatherine
POST /optics/incidence-angle-from-snell$0.002
⚙️ Developer UtilitiesFree
Spherical mirror object distance calculator
from focal and image distance
Kkatherine
POST /optics/mirror-object-distance$0.002
⚙️ Developer UtilitiesFree
Cauchy Dispersion Refractive Index Calculator
Kkatherine
POST /optics/cauchy-dispersion-index$0.002
⚙️ Developer UtilitiesFree
Double-slit bright fringe position calculator
Bbarbara
POST /optics/fringe-position-double-slit$0.002
⚙️ Developer UtilitiesFree
Relative refractive index calculator
calculate n₂ divided by n₁
Bbarbara
POST /optics/relative-refractive-index$0.002
⚙️ Developer UtilitiesFree
Bright Newton's ring radius
order, wavelength and curvature
Kkatherine
POST /optics/newtons-rings-bright-radius$0.002
⚙️ Developer UtilitiesFree
Thin film constructive interference calculator
film thickness
Bbarbara
POST /optics/thin-film-constructive$0.002
⚙️ Developer UtilitiesFree
Bragg law interplanar spacing calculator
Bbarbara
POST /optics/bragg-plane-spacing$0.002
⚙️ Developer UtilitiesFree
Coherence time calculator
convert coherence length to time
Kkatherine
POST /optics/coherence-time$0.002
⚙️ Developer UtilitiesFree
Luminous Intensity from Illuminance Calculator
Kkatherine
POST /optics/luminous-intensity-from-illuminance$0.002
⚙️ Developer UtilitiesFree
Stefan-Boltzmann radiant exitance calculator
blackbody M = σT⁴
Bbarbara
POST /optics/stefan-boltzmann-exitance$0.002
⚙️ Developer UtilitiesFree
Work Function from Threshold Wavelength Calculator
Kkatherine
POST /optics/work-function-from-threshold$0.002
⚙️ Developer UtilitiesFree
Fiber length from loss budget calculator
maximum reach
Kkatherine
POST /optics/fiber-length-from-loss-budget$0.002
⚙️ Developer UtilitiesFree
Graded-index fiber mode count calculator
Bbarbara
POST /optics/graded-index-fiber-modes$0.002
⚙️ Developer UtilitiesFree
Reciprocity shutter speed calculator for aperture stop changes
Kkatherine
POST /optics/reciprocity-shutter-speed$0.002
⚙️ Developer UtilitiesFree
Sunny 16 rule shutter speed calculator for any film ISO
Bbarbara
POST /optics/sunny-16-shutter-speed$0.002
⚙️ Developer UtilitiesFree
Radiant intensity calculator
power divided by solid angle
Bbarbara
POST /optics/radiant-intensity-from-power$0.002
⚙️ Developer UtilitiesFree
Data range calculator
maximum minus minimum
Kkatherine
POST /stat/data-range$0.002
⚙️ Developer UtilitiesFree
Decile calculator
find D1 through D9 from a data set
Bbarbara
POST /stat/deciles$0.002
⚙️ Developer UtilitiesFree
Excess kurtosis calculator
standardized fourth central moment
Kkatherine
POST /stat/excess-kurtosis$0.002
⚙️ Developer UtilitiesFree
Grubbs outlier test calculator
compute the G statistic
Bbarbara
POST /stat/grubbs-test$0.002
⚙️ Developer UtilitiesFree
Midhinge calculator
average of Q1 and Q3
Kkatherine
POST /stat/midhinge$0.002
⚙️ Developer UtilitiesFree
Coefficient of determination calculator
calculate R squared
Kkatherine
POST /stat/coefficient-determination$0.002
⚙️ Developer UtilitiesFree
Deviation scores calculator
subtract the mean from every value
Bbarbara
POST /stat/deviation-scores$0.002
⚙️ Developer UtilitiesFree
Geometric standard deviation calculator
measure multiplicative spread
Bbarbara
POST /stat/geometric-std-dev$0.002
⚙️ Developer UtilitiesFree
Sturges' Rule Bin Count Calculator
Kkatherine
POST /stat/sturges-rule$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.