ForHosting KIT
Free tools that work
right in your browser.
Calculators, converters, PDF, text, images and much more — each with its own page. Type your data and get the result right here, with no sign-up and without your data leaving your device. Need them in your own app? The same tools are available by API.
REST APILive
EmailLive
Webkit.forhosting.comLive
TelegramLive
iOS & AndroidBuilding
WhatsAppComing
7830tools
7432free in your browser
8languages
6channels
Find your tool
Search in your own words or filter by category.
🔬 ScienceFree
Hydrostatic pressure calculator
Ten metres down in water of 1000 kg/m³ with gravity at 9.81 m/s², the gauge pressure is 98100 Pa. Enter density, depth and gravity, and add the atmospheric…
A
Runs in your browser
🔬 ScienceFree
Ideal gas law calculator
One mole at 101325 Pa filling 0.0224 m³ sits just below 273.15 K. Give any three of pressure, volume, amount of gas and temperature, and the ideal gas law…
P
Runs in your browser
🔬 ScienceFree
Isothermal work calculator
One mole of ideal gas that doubles its volume at 300 K does 1728.9438964613 J of work. Enter the moles, the kelvin temperature and the volume ratio to get the…
A
Runs in your browser
🔬 ScienceFree
Kelvin converter
Type 25 °C and you get 77 °F and 298.15 K side by side. Each reading passes through the kelvin scale first, so the three values always agree, and anything…
A
Runs in your browser
🔬 ScienceFree
Linear thermal expansion calculator
A 10 m steel beam with α of 0.000012 per kelvin heated by 50 K grows 0.006 m, ending at 10.006 m. Enter the original length, the expansion coefficient and the…
A
Runs in your browser
🔬 ScienceFree
Newton's law of cooling calculator
Coffee at 90 °C in a 20 °C room, with a cooling constant of 0.05 per minute, has cooled to 62.457146179884 °C after 10 minutes.
P
Runs in your browser
🔬 ScienceFree
Pressure calculator
A force of 1000 N spread over 0.5 m² makes 2000 Pa, which is 0.02 bar. Enter any two of force, area and pressure to get the third, with the pressure given in…
A
Runs in your browser
🔬 ScienceFree
Relative humidity calculator
An actual vapour pressure of 1.5 kPa against a saturation pressure of 2.5 kPa means 60 % relative humidity.
P
Runs in your browser
🔬 ScienceFree
Reynolds number calculator
A fluid of 1000 kg/m³ moving at 2 m/s through a 0.05 m pipe, with a viscosity of 0.001 Pa·s, gives a Reynolds number of 100000, which points to turbulent flow.
A
Runs in your browser
🔬 ScienceFree
Specific heat capacity calculator
If 4184 J warm 1 kg of a sample by 1 K, its specific heat is 4184 J/(kg·K), the classic value for water.
A
Runs in your browser
🔬 ScienceFree
Heat conduction calculator
A 12 m² wall 0.2 m thick, with a conductivity of 0.8 W/(m·K) and 25 K between its faces, lets 1200 W of heat through.
P
Runs in your browser
🔬 ScienceFree
Thermal efficiency calculator
An engine that delivers 300 J of work from 1000 J of heat runs at 30 % efficiency and rejects 700 J.
A
Runs in your browser
🧭 Travel & geographyFree
Arrival local time calculator
Leave at 14:30 from UTC−5, fly 8 hours to UTC+0, and you land at 03:30 the next day. Enter the departure clock, flight length and both UTC offsets to see the…
A
Runs in your browser
🧭 Travel & geographyFree
Average speed calculator
Covering 120,000 metres in 7,200 seconds, every stop included, is an average of 60 km/h. Enter the path distance and the total elapsed time to get the overall…
A
Runs in your browser
🧭 Travel & geographyFree
Travel points value calculator
A 400 fare that costs 40,000 points as an award gives 1 cent per point, 0.5 below a 1.5-cent baseline, so paying cash may be wiser.
P
Runs in your browser
🧭 Travel & geographyFree
Cycling time estimator
40 km at an average of 20 km/h is 2 hours on the bike: the estimator divides distance by average speed and shows the result in hours, in minutes and as an…
P
Runs in your browser
🧭 Travel & geographyFree
Travel distance unit converter
100 statute miles are exactly 160.9344 km, because a mile is fixed at 1.609344 km and a nautical mile at 1.852 km.
A
Runs in your browser
🧭 Travel & geographyFree
ETA calculator
Leave at 09:30 with 180 km to go at an average of 90 km/h and you arrive at 11:30: the calculator adds the travel time to your leave time and gives an arrival…
P
Runs in your browser
🧭 Travel & geographyFree
MPG to L/100km converter
30 US miles per gallon is 7.84 litres per 100 km, and the same rating appears in imperial mpg and km per litre at once.
A
Runs in your browser
🧭 Travel & geographyFree
Luggage linear inches calculator
A 22 × 14 × 9 inch carry-on measures 45 linear inches, or 114.3 cm, which just meets a 45-inch limit.
A
Runs in your browser
🧭 Travel & geographyFree
Luggage volume calculator
A 55 × 40 × 20 cm cabin bag has a rectangular packing volume of 44 litres. Enter the three edges in centimetres, inches, millimetres or metres to get litres and…
A
Runs in your browser
🧭 Travel & geographyFree
Airline miles value calculator
An award costing 25,000 miles is worth the cash fare plus taxes it replaces, and the tool turns that into cents per point.
A
Runs in your browser
🧭 Travel & geographyFree
Driving range remaining calculator
Twelve gallons left in a car that averages 30 mpg means about 360 miles of range. The same multiplication works for litres with km per litre or kWh with miles…
A
Runs in your browser
🧭 Travel & geographyFree
Road trip time calculator
Drive 450 km at an average of 90 km/h and you spend 5 hours at the wheel; add 1.5 hours of breaks and you arrive 6 hours 30 minutes after leaving.
P
Runs in your browser
🧭 Travel & geographyFree
Speed unit converter
100 km/h comes out as 62.137119223733 mph, with the same speed also shown in knots and metres per second.
A
Runs in your browser
🧭 Travel & geographyFree
Timezone offset difference
When it is 15:30 at UTC+2, it is 08:30 at UTC−5, seven hours behind. Enter two fixed offsets and a local time to get the gap between the clocks and the matching…
P
Runs in your browser
🧭 Travel & geographyFree
Tire pressure by load calculator
A tire rated 1,500 lb at 35 PSI that carries 1,200 lb needs about three quarters of that pressure: the load ratio, 0.8, is raised to the power 1.25.
A
Runs in your browser
🧭 Travel & geographyFree
Road trip cost split
With 4 people in the car, each pays a quarter of fuel plus tolls, and the result shows that share split into its fuel part and its toll part.
A
Runs in your browser
🧭 Travel & geographyFree
Trip fuel cost estimator
A 300-mile trip at 30 mpg needs 10 gallons; multiply by your pump price and you have the fuel budget.
A
Runs in your browser
🧭 Travel & geographyFree
Walking time estimator
A 5 km walk at 5 km/h takes one hour, or 60 minutes. Enter the distance and your average walking speed in km/h, mph or any matching pair to see how long a city…
A
Runs in your browser
➗ MathFree
Amplitude, period & phase shift calculator
For 3 sin(2x), the amplitude is 3 and the period is π. Enter the coefficients A, B, C and D of any sine function to get its amplitude, period, phase shift and…
A
Runs in your browser
➗ MathFree
Angle of elevation calculator
A target 50 units higher at a horizontal distance of 100 sits at an angle of elevation of 26.565051177078°.
A
Runs in your browser
➗ MathFree
Coterminal angle calculator
Type 45° and you get 45° as the positive coterminal angle and −315° as the negative one, both within a single turn of the original ray.
A
Runs in your browser
➗ MathFree
Degrees minutes seconds converter
45° 30′ 36″ is exactly 45.51 decimal degrees, and the same tool splits a decimal angle back into degrees, minutes and seconds.
P
Runs in your browser
➗ MathFree
Double-angle calculator
For an angle of 30°, the doubled angle is 60°: sin(2x) is 0.8660254038, cos(2x) is 0.5 and tan(2x) is 1.7320508076.
A
Runs in your browser
➗ MathFree
Arccosine calculator
The arccosine of 0.5 is 60°, or 1.047197551197 radians, and both come back together so you never have to switch calculator modes.
A
Runs in your browser
➗ MathFree
Arctangent calculator
The arctangent of 1 is 45°, or 0.7853981634 radians: a slope that rises as much as it runs. Give two components instead and you get the full-plane heading with…
A
Runs in your browser
➗ MathFree
Law of cosines angle finder
Turn three side lengths into all three angles: sides 3, 4 and 5 give exactly 90° opposite the longest side and two acute angles at the other corners.
A
Runs in your browser
➗ MathFree
Law of sines calculator
Finish a whole triangle from sparse data: angle A of 40°, side a of 7 and angle B of 60° give a third angle of 80° plus both missing sides.
A
Runs in your browser
➗ MathFree
Polar to rectangular converter
Turn a distance and a direction into x and y on the plane: a radius of 5 at 45° lands on the same value on both axes, 5 ÷ √2. Angles go in degrees or radians.
P
Runs in your browser
➗ MathFree
Reference angle calculator
Reduce any angle to the acute angle your tables need: 225° lies in quadrant III and has a reference angle of 45°.
A
Runs in your browser
➗ MathFree
Right triangle trig solver
Get every side and angle from one angle and one length: a 30° angle with an opposite side of 5 gives a hypotenuse of 10 and a second acute angle of 60°, plus…
A
Runs in your browser
➗ MathFree
Sine cosine tangent calculator
One angle gives you all six trig functions at once, so 30° returns a sine of 0.5 and a cosecant of 2, with cosine, tangent, secant and cotangent beside them.
P
Runs in your browser
➗ MathFree
Sine wave calculator
Know the height of a sine wave at any point: with amplitude 2 and period 1, a quarter of the way along the wave reaches 2, its peak.
P
Runs in your browser
➗ MathFree
Sum and difference angle calculator
Combine two angles without guessing: 30° and 45° give a sum of 75° and a difference of −15°, each with its sine, cosine and tangent.
A
Runs in your browser
➗ MathFree
Exact trig values calculator
The sine of 30° is exactly 1/2 and its cosine is √3/2. Enter a special angle in degrees or radians and get exact radical values with decimals, the quadrant and…
A
Runs in your browser
📏 Unit convertersFree
Miles to km converter
10 miles are exactly 16.09344 km, because one international mile is 1.609344 km to the last digit.
A
Runs in your browser
➗ MathFree
Bearing and heading calculator
From (0, 0) to (1, 1) the bearing is 45°, northeast. Enter the x and y coordinates of a start and a target on a flat grid and get the direction measured…
A
Runs in your browser
📏 Unit convertersFree
Feet to cm converter
Turn feet into centimeters with the exact factor: 1 ft is 30.48 cm, the definition used in science, construction and schools since 1959.
A
Runs in your browser
➗ MathFree
Triangular number calculator
The 5th triangular number is 15 and the 10th is 55. Enter a position to get n(n+1)/2, enter any whole number to learn whether it is triangular and where it sits…
P
Runs in your browser
➗ MathFree
Harshad number checker
18 is a Harshad number: its digits add up to 9, and 18 divided by 9 is exactly 2. Enter any positive integer to see its digits, their sum and whether that sum…
A
Runs in your browser
🔬 ScienceFree
Rate constant from rate law calculator
A rate of 0.002 with A at 0.1 (first order) and B at 0.2 (second order) gives a rate constant k of 0.5 and an overall order of 3.
A
Runs in your browser
⚙️ Developer UtilitiesFree
PEM Base64 encoder
Wrap text the way certificates and keys are stored: standard Base64 folded into 64-character lines between matching -----BEGIN CERTIFICATE----- and -----END…
P
Runs in your browser
💰 Finance & moneyFree
Absence percentage calculator
Turn missed days into a rate you can compare: 6 days absent out of 22 scheduled workdays is an absence rate of 27.27%, whether the team has five people or 200.
G
Runs in your browser
➗ MathFree
AAA triangle calculator
Angles of 50, 60 and 70 degrees with a side of 8 opposite the 50° angle give the other sides at about 9 and just under 10.
A
Runs in your browser
🔬 ScienceFree
Absolute humidity calculator
At 30 °C and 60 % relative humidity the air holds roughly 18 g of water vapour per cubic metre; at 5 °C the same 60 % is barely 4 g.
H
Runs in your browser
🗂️ Data & FilesFree
Convert number base
101101 in binary is 2D in hexadecimal. Convert a whole number between any two bases from 2 to 36, and every digit is checked against its base first, so a slip…
M
Runs in your browser
🗂️ Data & FilesFree
IPv4 CIDR range calculator
Enter an address with its prefix and see the whole subnet: 192.168.1.10/24 runs from the network address 192.168.1.0 to the broadcast address 192.168.1.255…
M
Runs in your browser
✍️ Text & AIFree
Group anagrams online
Paste Listen, silent, enlist, stone, tones and Apple and get three groups: Listen with silent and enlist, stone with tones, and Apple on its own.
M
Runs in your browser
✍️ Text & AIFree
Pangram checker
Check whether a sentence uses all 26 letters from A to Z: The quick brown fox jumps over the lazy dog passes, and any text that falls short gets its missing…
K
Runs in your browser
No capabilities match your search.
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.
Pay-as-you-go
Per task
$0.002+
The full API — 7800+ capabilities — billed only for what you run, from $0.002 per call. No monthly fee.
Balance
$10.00+
Top up your balance and spend it across web, API and the app. It never expires.