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
Molar entropy converter
J/(mol·K), cal/(mol·K), eu, free
Aabuela
POST /conv/molar-entropy$0.002
⚙️ Developer UtilitiesFree
Molar flow rate converter
mol/s, mol/h, kmol/h, free
Aabuela
POST /conv/molar-flow-rate$0.002
⚙️ Developer UtilitiesFree
Molar volume converter
m³/mol, L/mol, mL/mol and more, free
PPavilion
POST /conv/molar-volume$0.002
⚙️ Developer UtilitiesFree
Nuclear cross section converter
barn, m², cm², free
Aabuela
POST /conv/nuclear-cross-section$0.002
⚙️ Developer UtilitiesFree
Numerical aperture converter
NA, f-number and acceptance angle, free
Aabuela
POST /conv/numerical-aperture$0.002
⚙️ Developer UtilitiesFree
Parsecs to light-years converter
exact IAU factor, free
PPavilion
POST /conv/parsecs-to-light-years$0.002
⚙️ Developer UtilitiesFree
Permeability converter
darcy, millidarcy, m² and more, free
PPavilion
POST /conv/permeability-darcy$0.002
⚙️ Developer UtilitiesFree
Permittivity converter
F/m, ε_r, pF/m, free
Aabuela
POST /conv/permittivity$0.002
⚙️ Developer UtilitiesFree
Photon energy converter
eV, nm wavelength, THz, free
Aabuela
POST /conv/photon-energy$0.002
⚙️ Developer UtilitiesFree
Pressure unit converter
Pa, kPa, bar, atm, psi, mmHg and torr, free
AAspire
POST /conv/pressure$0.002
⚙️ Developer UtilitiesFree
Pressure altitude converter
hPa, inHg, meters and more, free
Aabuela
POST /conv/pressure-altitude$0.002
⚙️ Developer UtilitiesFree
Pressure head converter
mH2O, ftH2O, psi and more, free
Aabuela
POST /conv/pressure-head$0.002
⚙️ Developer UtilitiesFree
Rainfall rate converter
mm/h, in/h, L/m²/h, free
Aabuela
POST /conv/rainfall-rate$0.002
⚙️ Developer UtilitiesFree
Audio sample rate converter
Hz, kHz, sps, free
PPavilion
POST /conv/sample-rate$0.002
⚙️ Developer UtilitiesFree
Screw gauge size converter
US #, mm & inch diameter, free
PPavilion
POST /conv/screw-size$0.002
⚙️ Developer UtilitiesFree
Section modulus converter
m³, cm³, mm³, in³, free
Aabuela
POST /conv/section-modulus$0.002
⚙️ Developer UtilitiesFree
Sheet metal gauge converter
gauge, mm, inches, free
Aabuela
POST /conv/sheet-metal-gauge$0.002
⚙️ Developer UtilitiesFree
Shutter speed converter
fraction, seconds, stops, free
Aabuela
POST /conv/shutter-speed$0.002
⚙️ Developer UtilitiesFree
Sieve mesh size converter
US, Tyler, micron, free
Aabuela
POST /conv/sieve-mesh$0.002
⚙️ Developer UtilitiesFree
Solar mass, radius & luminosity converter
SI units, free
Aabuela
POST /conv/solar-units$0.002
⚙️ Developer UtilitiesFree
Sound absorption converter
sabins ↔ metric sabins ↔ m², free
Aabuela
POST /conv/sound-absorption$0.002
⚙️ Developer UtilitiesFree
Sound power converter
W, dB re 1 pW, BTU/h, free
PPavilion
POST /conv/sound-power$0.002
⚙️ Developer UtilitiesFree
Specific impulse converter
seconds, m/s exhaust velocity, lbf·s/lb, free
PPavilion
POST /conv/specific-impulse$0.002
⚙️ Developer UtilitiesFree
Square km to square miles
exact factor, free in browser
PPavilion
POST /conv/square-km-to-square-miles$0.002
⚙️ Developer UtilitiesFree
Spring stiffness converter
N/m, lbf/in, kg/mm, free
Aabuela
POST /conv/stiffness$0.002
⚙️ Developer UtilitiesFree
Guitar string gauge converter
mils, mm & inches, free
PPavilion
POST /conv/string-gauge$0.002
⚙️ Developer UtilitiesFree
Surface charge density converter
C/m², C/cm², C/in², free
Aabuela
POST /conv/surface-charge-density$0.002
⚙️ Developer UtilitiesFree
Thermal conductance converter
W/K, BTU/(h·°F), cal/(s·K), free
PPavilion
POST /conv/thermal-conductance$0.002
⚙️ Developer UtilitiesFree
Thermal expansion coefficient converter
1/K, ppm/K, 1/°F, free
Aabuela
POST /conv/thermal-expansion-coefficient$0.002
⚙️ Developer UtilitiesFree
Thread count converter
TPI, threads/cm, per 10 cm and more, free
PPavilion
POST /conv/thread-count$0.002
⚙️ Developer UtilitiesFree
Thread pitch converter
TPI, mm pitch and threads/cm, free
Aabuela
POST /conv/thread-pitch$0.002
⚙️ Developer UtilitiesFree
Torr to PSI converter
exact torr factor, free
PPavilion
POST /conv/torr-to-psi$0.002
⚙️ Developer UtilitiesFree
Turbidity converter
NTU, FNU, FTU, JTU, free
PPavilion
POST /conv/turbidity$0.002
⚙️ Developer UtilitiesFree
Vacuum pressure converter
torr, mbar, Pa, micron, free
PPavilion
POST /conv/vacuum$0.002
⚙️ Developer UtilitiesFree
Water conductivity & TDS converter
µS/cm, ppm, gpg, free
Aabuela
POST /conv/water-conductivity$0.002
⚙️ Developer UtilitiesFree
Cups to grams converter
flour, sugar, butter and more by ingredient density, free
AAspire
POST /cook/cups-grams$0.002
⚙️ Developer UtilitiesFree
Fluid ounces to ml converter
US and imperial fl oz ↔ milliliters, free
AAspire
POST /cook/fl-oz-ml$0.002
⚙️ Developer UtilitiesFree
Flour cups to grams converter
all-purpose, bread & cake, free
PPavilion
POST /cook/flour$0.002
⚙️ Developer UtilitiesFree
Gas mark converter
oven °C & °F from Gas Mark, free
PPavilion
POST /cook/gas-mark$0.002
⚙️ Developer UtilitiesFree
Grams to cups converter
by ingredient density, free
Aabuela
POST /cook/grams-cups$0.002
⚙️ Developer UtilitiesFree
mL to cups converter
US, metric & imperial cups, free
Aabuela
POST /cook/ml-cups$0.002
⚙️ Developer UtilitiesFree
Oven temperature converter
Celsius, Fahrenheit and oven heat labels, free
AAspire
POST /cook/oven-temp$0.002
⚙️ Developer UtilitiesFree
Cooking ounces to grams converter
kitchen weight oz ↔ g, free
AAspire
POST /cook/oz-grams$0.002
⚙️ Developer UtilitiesFree
Quarts to liters converter
US & imperial quarts, free
Aabuela
POST /cook/quarts-liters$0.002
⚙️ Developer UtilitiesFree
Recipe scaler
scale ingredient amounts by servings or multiplier, free
PPavilion
POST /cook/recipe-scale$0.002
⚙️ Developer UtilitiesFree
Rice cups to grams converter
raw or cooked, free
Aabuela
POST /cook/rice$0.002
⚙️ Developer UtilitiesFree
Sugar cups to grams converter
granulated, brown and powdered by density, free
AAspire
POST /cook/sugar$0.002
⚙️ Developer UtilitiesFree
Tablespoons to ml converter
US, metric & Australian tbsp, free
PPavilion
POST /cook/tbsp-ml$0.002
⚙️ Developer UtilitiesFree
US to metric cooking converter
cups, tbsp, fl oz ↔ ml, g, free
AAspire
POST /cook/us-metric$0.002
⚙️ Developer UtilitiesFree
Yeast conversion converter
active dry, instant & fresh, free
Aabuela
POST /cook/yeast$0.002
⚙️ Developer UtilitiesFree
Add days to a date
ISO calendar date plus or minus N days, free
AAspire
POST /date/add-days$0.002
⚙️ Developer UtilitiesFree
Add years to a date
ISO calendar date plus or minus N years, free
AAspire
POST /date/add-years$0.002
⚙️ Developer UtilitiesFree
Birth flower by month
traditional birth flowers for each month
PPavilion
POST /date/birth-flower$0.002
⚙️ Developer UtilitiesFree
Chinese zodiac element calculator
animal + five-element year in the 60-year cycle, free
AAspire
POST /date/chinese-zodiac-element$0.002
⚙️ Developer UtilitiesFree
Countdown between two dates
days hours minutes seconds, free
Aabuela
POST /date/countdown-between$0.002
⚙️ Developer UtilitiesFree
Day of year to date converter
ordinal 1–366 to calendar YYYY-MM-DD, free
AAspire
POST /date/date-from-dayofyear$0.002
⚙️ Developer UtilitiesFree
Day of the week calculator
name and number from an ISO date
PPavilion
POST /date/day-of-week$0.002
⚙️ Developer UtilitiesFree
Day of the year calculator
ISO date to ordinal day 1–366, free
AAspire
POST /date/day-of-year$0.002
⚙️ Developer UtilitiesFree
Days in a month calculator
leap years included, free
Aabuela
POST /date/days-in-month$0.002
⚙️ Developer UtilitiesFree
Days left in the year
remaining days until December 31, free
PPavilion
POST /date/days-remaining-year$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.