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
LM317 calculator
output voltage from R1 and R2
Ssamurai
POST /elec/lm317$0.002
⚙️ Developer UtilitiesFree
Latitude longitude distance
haversine km between two points
Aabuela
POST /geo/latitude-longitude-distance$0.002
⚙️ Developer UtilitiesFree
Minecraft stack calculator
items to stacks of 64 or 16
Aabuela
POST /game/minecraft-stack$0.002
⚙️ Developer UtilitiesFree
MM to carat conversion
gemstone diameter to carat weight
Ssamurai
POST /hobby/mm-to-carat-conversion$0.002
⚙️ Developer UtilitiesFree
NaNoWriMo daily word count
words per day to finish
Ssamurai
POST /edu/nanowrimo$0.002
⚙️ Developer UtilitiesFree
Song duration calculator
BPM, time signature, and measures
PPavilion
POST /hobby/music-duration$0.002
⚙️ Developer UtilitiesFree
Music transposer
notes and chord progressions by semitones
Aabuela
POST /hobby/music-transposer$0.002
⚙️ Developer UtilitiesFree
Op-amp gain calculator
inverting Av = −Rf/Rin, free
Aabuela
POST /elec/op-amp-gain$0.002
⚙️ Developer UtilitiesFree
Odd parity bit calculator
0 or 1 so ones count is odd, free
PPavilion
POST /enc/odd-parity$0.002
⚙️ Developer UtilitiesFree
Password entropy calculator
bits of strength from charset size and length
Ssamurai
POST /security/password-entropy$0.002
🎧 Audio & VoiceFree
Playback speed calculator
adjusted media duration at any rate
Aabuela
POST /audio/playback-speed$0.002
⚙️ Developer UtilitiesFree
PCB trace current calculator
max safe amps from width
PPavilion
POST /elec/pcb-trace-current$0.002
⚙️ Developer UtilitiesFree
PCB trace width calculator
minimum width in mils
Aabuela
POST /elec/pcb-trace-width$0.002
🖼️ ImagesFree
Pixel aspect ratio calculator
PAR from DAR and resolution
Ssamurai
POST /image/pixel-aspect-ratio$0.002
⚙️ Developer UtilitiesFree
Pizza tip calculator
tip, total, and per-person share
PPavilion
POST /life/pizza-tip$0.002
🎧 Audio & VoiceFree
Port length calculator
speaker enclosure vent length in inches
Aabuela
POST /audio/port-length$0.002
🖼️ ImagesFree
Portrait aspect ratio calculator
4:5 from pixel size
PPavilion
POST /image/portrait-aspect-ratio$0.002
⚙️ Developer UtilitiesFree
RAM latency calculator
first-word ns from CAS and MHz
Aabuela
POST /dev/ram-latency$0.002
⚙️ Developer UtilitiesFree
RAID calculator
usable capacity and disk fault tolerance
PPavilion
POST /game/raid$0.002
⚙️ Developer UtilitiesFree
Rounds per minute calculator
convert per-second or per-hour fire rate
PPavilion
POST /biz/rounds-per-minute$0.002
⚙️ Developer UtilitiesFree
Semitone calculator
nearest note and cents from frequency in Hz
PPavilion
POST /hobby/semitone$0.002
⚙️ Developer UtilitiesFree
Sandbox calculator
cubic feet of sand and bag count from size
Aabuela
POST /home/sandbox$0.002
🎬 VideoFree
Resolution scale calculator
new width and height, free
Ssamurai
POST /video/resolution-scale$0.002
🎧 Audio & VoiceFree
Speaker box calculator
optimal enclosure volume from Vas, Qts, Fs
PPavilion
POST /audio/speaker-box$0.002
⚙️ Developer UtilitiesFree
Snowman calculator
snow volume from three ball radii
Ssamurai
POST /hobby/snowman$0.002
⚙️ Developer UtilitiesFree
Small caps converter
Unicode small-capital letters from lowercase
Aabuela
POST /str/small-caps$0.002
⚙️ Developer UtilitiesFree
Test grade calculator
letter grade from score and maximum
PPavilion
POST /edu/test-grade$0.002
⚙️ Developer UtilitiesFree
Tip from net price
suggested tip and gross total, free
Ssamurai
POST /life/tip-from-net-price$0.002
⚙️ Developer UtilitiesFree
Subscript generator
Unicode subscript letters and digits
Aabuela
POST /str/subscript-generator$0.002
⚙️ Developer UtilitiesFree
Superscript generator
Unicode tiny raised letters & digits, free
Ssamurai
POST /str/superscript-generator$0.002
🎬 VideoFree
Time-lapse calculator
playback duration from capture interval
Aabuela
POST /video/time-lapse$0.002
⚙️ Developer UtilitiesFree
Travel job application cost calculator
fees, documents, travel, free
PPavilion
POST /biz/travel-job-application$0.002
🖼️ ImagesFree
TV mounting height calculator
center the screen at eye level
Aabuela
POST /image/tv-mounting-height$0.002
🎬 VideoFree
Video file size calculator
MB or GB from bitrate, fps, duration
PPavilion
POST /video/video-size$0.002
⚙️ Developer UtilitiesFree
What grade was I in year
US school grade from birth year
Aabuela
POST /edu/what-grade-was-i-in-year$0.002
⚙️ Developer UtilitiesFree
Activation energy calculator
Arrhenius Ea from two rates, free
Aabuela
POST /chem/activation-energy$0.002
⚙️ Developer UtilitiesFree
Alligation calculator
mix two concentrations to a target, free
Ssamurai
POST /chem/alligation$0.002
⚙️ Developer UtilitiesFree
Atomic mass calculator
isotope masses and abundances to amu
Aabuela
POST /chem/atomic-mass$0.002
⚙️ Developer UtilitiesFree
Avogadro calculator
moles to particles N = n·N_A, free
PPavilion
POST /chem/avogadro$0.002
⚙️ Developer UtilitiesFree
Boiling point calculator
Tb = T0 + Kb·m from molality
Ssamurai
POST /chem/boiling-point$0.002
⚙️ Developer UtilitiesFree
Calibration curve calculator
least-squares slope, intercept and R²
Aabuela
POST /chem/calibration-curve$0.002
⚙️ Developer UtilitiesFree
Chemical name from formula
common name for a known compound
PPavilion
POST /chem/chemical-name$0.002
⚙️ Developer UtilitiesFree
Combustion reaction calculator
O₂, CO₂ and H₂O from CₓHᵧ
Ssamurai
POST /chem/combustion-reaction$0.002
⚙️ Developer UtilitiesFree
Crude protein calculator
nitrogen % × conversion factor
Aabuela
POST /chem/crude-protein$0.002
⚙️ Developer UtilitiesFree
Hydraulic detention time calculator
τ = V/Q from tank volume and flow
PPavilion
POST /chem/detention-time$0.002
⚙️ Developer UtilitiesFree
Effective nuclear charge calculator
Z_eff = Z − S, free
Aabuela
POST /chem/effective-charge$0.002
⚙️ Developer UtilitiesFree
Electrolysis calculator
mass deposited or gas evolved, Faraday
Ssamurai
POST /chem/electrolysis$0.002
⚙️ Developer UtilitiesFree
Witcher monster slayer
hits needed and leftover damage
PPavilion
POST /game/witcher-monster-slayer$0.002
⚙️ Developer UtilitiesFree
Wind chill calculator
perceived temperature from °C and km/h
Ssamurai
POST /weather/wind-chill$0.002
🗂️ Data & FilesFree
Data transfer time calculator
file size and connection speed
Ssamurai
POST /web/data-transfer$0.002
⚙️ Developer UtilitiesFree
Entropy calculator
ΔS from Q/T or standard molar entropies, free
PPavilion
POST /chem/entropy$0.002
⚙️ Developer UtilitiesFree
Graham's law of diffusion calculator
rate ratio √(M2/M1), free
Aabuela
POST /chem/grahams-law-of-diffusion$0.002
⚙️ Developer UtilitiesFree
Heat of combustion calculator
energy from mass and calorific value
Ssamurai
POST /chem/heat-of-combustion$0.002
⚙️ Developer UtilitiesFree
Langmuir isotherm calculator
fractional coverage θ = KP/(1+KP)
Aabuela
POST /chem/langmuir-isotherm$0.002
⚙️ Developer UtilitiesFree
Kp calculator
equilibrium constant from partial pressures
PPavilion
POST /chem/kp$0.002
⚙️ Developer UtilitiesFree
Liquid ethylene density calculator
ρ(T) in kg/m³, free
Ssamurai
POST /chem/liquid-ethylene-density$0.002
⚙️ Developer UtilitiesFree
Miller indices calculator
intercepts to (hkl), free
Aabuela
POST /chem/miller-indices$0.002
⚙️ Developer UtilitiesFree
Mixing ratio calculator
g/kg from vapor and total pressure
PPavilion
POST /chem/mixing-ratio$0.002
⚙️ Developer UtilitiesFree
Molar ratio calculator
mole ratio from two masses, free
Ssamurai
POST /chem/molar-ratio$0.002
⚙️ Developer UtilitiesFree
Neutralization calculator
acid or base volume at equivalence
Aabuela
POST /chem/neutralization$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.