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
Sphere great circle calculator
circumference and area from radius
PPavilion
POST /geom/sphere-great-circle$0.002
⚙️ Developer UtilitiesFree
Sphere radius from surface area calculator
r = √(S / 4π)
Ssamurai
POST /geom/sphere-radius-surface$0.002
⚙️ Developer UtilitiesFree
Sphere surface area calculator
S = 4πr² from radius free
PPavilion
POST /geom/sphere-surface$0.002
⚙️ Developer UtilitiesFree
Spherical cap surface area
A = 2πRh from radius and height
Aabuela
POST /geom/spherical-cap-surface$0.002
⚙️ Developer UtilitiesFree
Spherical lune area calculator
radius and dihedral angle to surface area
PPavilion
POST /geom/spherical-lune$0.002
⚙️ Developer UtilitiesFree
Spherical wedge volume calculator
radius and dihedral angle to volume
PPavilion
POST /geom/spherical-wedge$0.002
⚙️ Developer UtilitiesFree
Spindle torus calculator
self-intersecting volume and area
Aabuela
POST /geom/spindle-torus$0.002
⚙️ Developer UtilitiesFree
Square area calculator
A = side × side, free
Aabuela
POST /geom/square-area$0.002
⚙️ Developer UtilitiesFree
Square diagonal calculator
diagonal length from side (s√2)
PPavilion
POST /geom/square-diagonal$0.002
⚙️ Developer UtilitiesFree
Square side from area calculator
side = √A, free
Aabuela
POST /geom/square-side-area$0.002
⚙️ Developer UtilitiesFree
Square side from diagonal calculator
side = d/√2, free
Aabuela
POST /geom/square-side-diagonal$0.002
⚙️ Developer UtilitiesFree
Stellated octahedron calculator
volume and surface area from edge length
Aabuela
POST /geom/stellated-octahedron$0.002
⚙️ Developer UtilitiesFree
Stewart's theorem calculator
cevian length from sides and base division
Ssamurai
POST /geom/stewart-theorem$0.002
⚙️ Developer UtilitiesFree
Superellipse area calculator
Lamé curve area from semi-axes and exponent
Ssamurai
POST /geom/superellipse-area$0.002
⚙️ Developer UtilitiesFree
Tangent length from external point
√(d²−r²) calculator
PPavilion
POST /geom/tangent-length-point$0.002
⚙️ Developer UtilitiesFree
Tetrahedron height calculator
vertical height from edge length
Ssamurai
POST /geom/tetrahedron-height$0.002
⚙️ Developer UtilitiesFree
Tetrahedron inradius calculator
inscribed sphere radius from edge length
PPavilion
POST /geom/tetrahedron-inradius$0.002
⚙️ Developer UtilitiesFree
Tetrahedron midradius calculator
midsphere radius from edge length
PPavilion
POST /geom/tetrahedron-midradius$0.002
⚙️ Developer UtilitiesFree
Tetrahedron surface area calculator
A = a²√3 from edge length
Aabuela
POST /geom/tetrahedron-surface$0.002
⚙️ Developer UtilitiesFree
Trapezoid diagonal calculator
both diagonals from sides and height
PPavilion
POST /geom/trapezoid-diagonal$0.002
⚙️ Developer UtilitiesFree
Trapezoid height from area calculator
bases and area to height
Ssamurai
POST /geom/trapezoid-height$0.002
⚙️ Developer UtilitiesFree
Trapezoid perimeter calculator
sum of four side lengths
Aabuela
POST /geom/trapezoid-perimeter$0.002
⚙️ Developer UtilitiesFree
Triakis tetrahedron calculator
volume and surface area from edge length
PPavilion
POST /geom/triakis-tetrahedron$0.002
⚙️ Developer UtilitiesFree
Triangle altitude lengths calculator
heights from three sides
Ssamurai
POST /geom/triangle-altitudes$0.002
⚙️ Developer UtilitiesFree
Triangle angle bisector lengths
three sides to all three lengths
PPavilion
POST /geom/triangle-angle-bisectors$0.002
⚙️ Developer UtilitiesFree
Triangle inequality checker
do three side lengths form a valid triangle?
PPavilion
POST /geom/triangle-inequality$0.002
⚙️ Developer UtilitiesFree
Triangle inradius calculator
inscribed circle radius from three sides
Aabuela
POST /geom/triangle-inradius$0.002
⚙️ Developer UtilitiesFree
Triangle semiperimeter calculator
s = (a+b+c)/2 from three sides
PPavilion
POST /geom/triangle-semiperimeter$0.002
⚙️ Developer UtilitiesFree
Triangle type by angles
acute, right or obtuse classifier
Aabuela
POST /geom/triangle-type-angles$0.002
⚙️ Developer UtilitiesFree
Triangular pyramid calculator
volume and surface from edge & height
Aabuela
POST /geom/triangular-pyramid$0.002
⚙️ Developer UtilitiesFree
Truncated cube calculator
volume and surface area from edge length
PPavilion
POST /geom/truncated-cube$0.002
⚙️ Developer UtilitiesFree
Truncated dodecahedron calculator
volume and surface from edge length
Aabuela
POST /geom/truncated-dodecahedron$0.002
⚙️ Developer UtilitiesFree
Truncated icosidodecahedron
volume and surface from edge length
Aabuela
POST /geom/truncated-icosidodecahedron$0.002
⚙️ Developer UtilitiesFree
Truncated octahedron calculator
volume and surface area from edge length
PPavilion
POST /geom/truncated-octahedron$0.002
⚙️ Developer UtilitiesFree
Truncated tetrahedron calculator
volume and surface area from edge length
Aabuela
POST /geom/truncated-tetrahedron$0.002
⚙️ Developer UtilitiesFree
Direction angle of a vector calculator
2D atan2 from components
Aabuela
POST /geom/vector-angle-2d$0.002
⚙️ Developer UtilitiesFree
Adjusted body weight calculator
ABW from actual & ideal weight, free
PPavilion
POST /health/adjusted-body-weight$0.002
⚙️ Developer UtilitiesFree
Appendicular skeletal muscle mass calculator
ASM & ASMI
Ssamurai
POST /health/appendicular-muscle-mass$0.002
⚙️ Developer UtilitiesFree
Original Harris-Benedict 1919 BMR calculator
classic basal metabolic rate
Aabuela
POST /health/bmr-harris-benedict-1919$0.002
⚙️ Developer UtilitiesFree
Mueller equation BMR calculator
basal rate from weight, height, age
PPavilion
POST /health/bmr-mueller$0.002
⚙️ Developer UtilitiesFree
Oxford Henry BMR calculator
basal rate from weight, sex, age
PPavilion
POST /health/bmr-oxford-henry$0.002
⚙️ Developer UtilitiesFree
Schofield BMR calculator
WHO basal metabolic rate by weight, sex, age
Ssamurai
POST /health/bmr-schofield$0.002
⚙️ Developer UtilitiesFree
Body Roundness Index calculator
BRI from waist and height, free
Aabuela
POST /health/body-roundness-index$0.002
⚙️ Developer UtilitiesFree
Covert Bailey body fat calculator
four girth measurements, free
PPavilion
POST /health/bodyfat-covert-bailey$0.002
⚙️ Developer UtilitiesFree
Deurenberg body fat from BMI
age and sex equation, free
Ssamurai
POST /health/bodyfat-deurenberg$0.002
⚙️ Developer UtilitiesFree
Gallagher body fat calculator
BMI, age & sex equation, free
PPavilion
POST /health/bodyfat-gallagher$0.002
⚙️ Developer UtilitiesFree
Jackson-Pollock 3-site body fat for women
skinfolds + age, free
Ssamurai
POST /health/bodyfat-jp3-women$0.002
⚙️ Developer UtilitiesFree
Jackson-Pollock 4-site body fat calculator
skinfold sum & age, free
PPavilion
POST /health/bodyfat-jp4$0.002
⚙️ Developer UtilitiesFree
Parrillo 9-site body fat calculator
skinfold sum formula
Aabuela
POST /health/bodyfat-parrillo$0.002
⚙️ Developer UtilitiesFree
Body surface area calculator
Boyd formula BSA, free
Aabuela
POST /health/bsa-boyd$0.002
⚙️ Developer UtilitiesFree
Body surface area Fujimoto calculator
BSA from height and weight
PPavilion
POST /health/bsa-fujimoto$0.002
⚙️ Developer UtilitiesFree
Lean bulk calorie calculator
surplus % from maintenance, free
Ssamurai
POST /health/bulking-calories$0.002
⚙️ Developer UtilitiesFree
Calorie target for weight goal
daily intake by date range, free
Aabuela
POST /health/calorie-goal-by-date$0.002
⚙️ Developer UtilitiesFree
Calorie cycling zigzag planner
weekly intake high/low days
Aabuela
POST /health/calorie-zigzag$0.002
⚙️ Developer UtilitiesFree
Carb intake calculator
daily grams from calories and percent, free
PPavilion
POST /health/carb-intake$0.002
⚙️ Developer UtilitiesFree
Conicity index calculator
central fat from waist, weight & height
PPavilion
POST /health/conicity-index$0.002
⚙️ Developer UtilitiesFree
CSS swim training pace calculator
critical swim speed interval offsets
Ssamurai
POST /health/css-training-paces$0.002
⚙️ Developer UtilitiesFree
Cutting phase calorie calculator
intake from TDEE and deficit %
PPavilion
POST /health/cutting-calories$0.002
⚙️ Developer UtilitiesFree
Dietary energy density calculator
kcal per gram of a meal
PPavilion
POST /health/energy-density-diet$0.002
⚙️ Developer UtilitiesFree
Calories from macronutrients calculator (Atwater)
PPavilion
POST /health/energy-from-macros$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.