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.
📅 Dates & timeFree
Quarters elapsed in fiscal year calculator
On 12 August 2026, with a fiscal year that starts in April, you are in fiscal Q2: one quarter is complete and three remain, counting the current one.
F
Runs in your browser
📅 Dates & timeFree
Ship-by date calculator
Enter the promised delivery date and the carrier's transit in working days to get the latest day to ship: for delivery on Monday 27 July 2026 with five working…
P
Runs in your browser
📅 Dates & timeFree
Weekends Until Date Calculator
From August 12 to September 7, 2026 there are 3 full weekends in 27 days. Only weekends whose Saturday and Sunday both fall inside your range are counted, so a…
K
Runs in your browser
📅 Dates & timeFree
Working days in month calculator
July 2026 has 23 working days: 31 calendar days minus 8 Saturdays and Sundays. Choose a year and a month, add your company holidays, and get one number for hour…
P
Runs in your browser
📅 Dates & timeFree
Years of service calculator
Someone hired on March 15, 2018 has served 8 years, 4 months and 10 days by July 25, 2026. Enter a hire date and a cut-off date to check award eligibility…
A
Runs in your browser
📄 Documents & PDFFree
Business cards per sheet calculator
A 210 by 297 mm sheet holds 10 cards of 85 by 55 mm with 3 mm gutters, in 2 columns and 5 rows. Enter your sheet, card and gutter sizes to see both orientations…
B
Runs in your browser
📄 Documents & PDFFree
Color vs black and white print cost calculator
Printing 50 copies of a 24-page document means 1,200 pages, and with the rates in the example black and white saves 72.22% of the color bill.
K
Runs in your browser
📄 Documents & PDFFree
Labels per sheet calculator
A 210 × 297 sheet with side margins of 8, top and bottom margins of 10 and gaps of 2 and 3 holds 12 labels of 63.5 × 38.1, in 2 columns by 6 rows.
B
Runs in your browser
📄 Documents & PDFFree
Paper needed for copies calculator
100 copies of a 24-page handout, single-sided, use 2400 sheets, 4.8 reams exact, so you order 5 reams and keep 100 sheets spare.
S
Runs in your browser
📄 Documents & PDFFree
Paper stack height calculator
500 sheets at 0.1 mm each make a 50 mm stack: multiply the sheet count by one sheet's thickness to size cartons, shelves and pallet layers before you load them.
P
Runs in your browser
📄 Documents & PDFFree
Print run ink usage calculator
10000 A4 pages at 5 % coverage with a 1 µm film use about 31.185 ml of ink, printed on one side: enter coverage and page count, add paper size, film thickness…
A
Runs in your browser
📄 Documents & PDFFree
Toner cost per page calculator
A standard cartridge rated for 1,500 pages against a high-yield one rated for 3,500: the dearer box on the shelf can come out more than a fifth cheaper per…
A
Runs in your browser
🔬 ScienceFree
Dry air density calculator
Enter absolute pressure and temperature, such as the sea-level reference of 101325 Pa and 288.15 K, and get the density of dry air in kg/m³ from the ideal gas…
B
Runs in your browser
🔬 ScienceFree
Air density ratio to sea level calculator from pressure and temperature
Compare your air with sea-level air at 101325 Pa and 15 °C: a ratio of 0.80 means about eighty percent of that density, and 1.10 means about ten percent denser.
F
Runs in your browser
🔬 ScienceFree
Surface Albedo Reflected Radiation Calculator
Find how much sunlight a surface sends back: 800 W/m² on an albedo of 0.3 reflects 240 W/m² and absorbs 560 W/m².
F
Runs in your browser
🔬 ScienceFree
Air quality index from carbon monoxide
An eight-hour carbon monoxide average of 4 ppm equals AQI 45, in the Good category, on the official US EPA table.
S
Runs in your browser
🔬 ScienceFree
Gutenberg-Richter b Value Calculator
Measure how steeply earthquake counts fall as magnitude grows: six events, complete from magnitude 2.1 and reported in 0.1 bins, give a b value just over three…
F
Runs in your browser
🔬 ScienceFree
Betz Limit Maximum Wind Power Calculator
See the physical ceiling on wind power: a 100 m² rotor in a 10 m/s wind can capture at most 36.32125 kW, or 59.3 % of the power in the moving air.
F
Runs in your browser
🔬 ScienceFree
Flight carbon footprint calculator
Put a number on one seat’s climate impact: 5500 km in economy with the default factors comes to 1201.75 kg of CO₂e.
P
Runs in your browser
🔬 ScienceFree
Climate Running Mean Smoother Calculator
Smooth noisy climate data without shifting it in time: seven yearly values with a 3-point window give 5 centered means, the first aligned with index 1 and the…
B
Runs in your browser
🔬 ScienceFree
CO2 Offset Tree Equivalent Calculator
Picture a CO2 total as trees: 1000 kg at 22 kg per tree each year equals 45.45 tree equivalents, so 46 whole trees would be needed.
K
Runs in your browser
🔬 ScienceFree
Coriolis parameter calculator
Turn a latitude into the Coriolis parameter: at 45° north, f is 0.000103126079 per second with Earth's rotation rate.
S
Runs in your browser
🔬 ScienceFree
Effective growing degree days calculator
Count only the heat crops can use: with a base of 10 and a cutoff of 30, three days of 28/12, 32/18 and 22/8 add up to 30 effective degree days.
S
Runs in your browser
🔬 ScienceFree
Density altitude from pressure altitude and temperature calculator
See how heat thins the air for flying: a pressure altitude of 5000 ft at 30 °C is 24.906 °C above standard and gives a density altitude of 7800.726033 ft.
K
Runs in your browser
🔬 ScienceFree
Sonntag 1990 dew point calculator from temperature and humidity
Turn a temperature and humidity reading into a dew point: 25 °C at 60 % relative humidity gives 16.701894 °C, with vapour pressures of 31.699039 and 19.019424…
K
Runs in your browser
🔬 ScienceFree
Diurnal temperature range calculator
Measure how much your days swing between warm and cool: highs of 28, 30 and 26 with lows of 12, 14 and 11 give daily ranges of 16, 16 and 15, a mean of fifteen…
S
Runs in your browser
🔬 ScienceFree
Equivalent potential temperature calculator
Compare moist air parcels on one scale: air at 300 K and 1000 hPa holding 10 g/kg of vapour has an equivalent potential temperature of 331.127577766795 K.
S
Runs in your browser
🔬 ScienceFree
Blaney-Criddle evapotranspiration calculator
Estimate crop water demand from just two climate figures: a mean temperature of 20 °C gives a temperature factor of 17.2, which is multiplied by the daytime…
F
Runs in your browser
🔬 ScienceFree
Hargreaves-Samani ET0 calculator
Get reference evapotranspiration from temperature records alone: a day of 12 to 28 °C, mean 20 °C, with radiation of 35 mm/day gives an ET0 of 12.1716 mm/day.
S
Runs in your browser
🔬 ScienceFree
Ship Froude number calculator
Compare hull speed with the waves the hull makes: a 100 m waterline at 10 m/s gives a Froude number of 0.31933, in the transition band where wave-making…
F
Runs in your browser
🔬 ScienceFree
Geopotential to Geometric Height Calculator
Turn a gravity-normalized height into real distance: a geopotential height of 10000 m sits more than fifteen metres higher in geometric terms.
F
Runs in your browser
🔬 ScienceFree
Greywater Reuse Water Savings Calculator
Reusing 450 liters of greywater at an efficiency of 0.8 saves 360 liters of drinking water, and the other 90 liters appear as unrecovered so the balance always…
K
Runs in your browser
🔬 ScienceFree
Growing degree days calculator
A day with a low of 50 °F and a high of 86 °F averages 68 °F, so against a 50 °F base it adds 18 growing degree days.
B
Runs in your browser
🔬 ScienceFree
Growing Season Length Calculator from Daily Frost Data
If the last spring frost falls on April 10 and the first autumn frost on October 20, your growing season lasts 193 days.
K
Runs in your browser
🔬 ScienceFree
Simplified heat index calculator
At 86 °F and 65 % relative humidity, the simplified heat index comes out at 87.36 °F, a quick reading of how muggy air adds to the heat.
B
Runs in your browser
🔬 ScienceFree
Steadman apparent temperature calculator with wind and radiation
At 30 °C, 65 % humidity, 2.5 m/s of wind and 120 W/m² of net radiation, conditions feel like 40.29 °C, and you see how much humidity, wind and sun each added or…
B
Runs in your browser
🔬 ScienceFree
Heat Pump Output from COP Calculator
A heat pump drawing 2.5 kW at a COP of 3.8 delivers 9.5 kW of heat, and the result keeps whatever unit you entered, so kilowatt-hours in give kilowatt-hours…
B
Runs in your browser
🔬 ScienceFree
Hydraulic conductivity from permeability calculator
Hydraulic conductivity follows from K = kρg/μ: enter permeability in m², water at 998.2 kg/m³ and 0.001002 Pa·s, and standard gravity of 9.80665 m/s² fills in…
K
Runs in your browser
🔬 ScienceFree
Hydraulic Radius of Channel Calculator
Divide 12.5 m² of flow area by 8.2 m of wetted perimeter and you have the channel's hydraulic radius, in meters.
B
Runs in your browser
🔬 ScienceFree
Solar inverter sizing calculator
A 7200-watt solar array at a DC-to-AC ratio of 1.2 points to an inverter of 6000 watts, or 6 kW. Use it to compare design ratios early and keep the arithmetic…
K
Runs in your browser
🔬 ScienceFree
Koppen Climate Classification Calculator
Twelve months averaging 26.68 °C with 2560 mm of rain a year classify as Af, tropical rainforest, and you see the aridity threshold of 673.5 mm and the coldest…
F
Runs in your browser
🔬 ScienceFree
Landfill methane generation calculator
Enter 10000 Mg of waste, a methane potential of 100 m³ per Mg, a decay rate of 0.05 per year and an age of 10 years to see that year's methane rate, the total…
S
Runs in your browser
🔬 ScienceFree
Lifting condensation level temperature calculator
Surface air at 30 °C with a 20 °C dew point becomes saturated at 17.665117 °C when lifted: that is the lifting condensation level temperature, shown in Celsius…
F
Runs in your browser
🔬 ScienceFree
Longshore sediment transport rate calculator
Waves breaking 1.5 m high at 15 degrees from the shore-normal give sin(2α) = 0.5, and with the default K of 0.39 the CERC formula turns that into a longshore…
P
Runs in your browser
🔬 ScienceFree
Earthquake energy ratio between magnitudes calculator
A magnitude 7 earthquake releases about 998.56 times the energy of a magnitude 5, because each whole step multiplies energy by roughly 31.6.
B
Runs in your browser
🔬 ScienceFree
Manning Open-Channel Discharge Calculator
Enter a roughness of 0.03, a hydraulic radius of 1.2 m, a flow area of 4.5 m² and a bed slope of 0.002, and Manning's equation returns the channel's discharge…
K
Runs in your browser
🔬 ScienceFree
Atmospheric moisture flux calculator
Air holding 0.01 kg of water vapor per kg and moving at 10 m/s carries a horizontal moisture flux of 0.1, the product of specific humidity and wind.
P
Runs in your browser
🔬 ScienceFree
Annual pluviometric index calculator
Twelve months adding up to 1260 mm against a long-term mean of 1200 mm give a pluviometric index of 105, five percent above normal and classed as near the mean.
B
Runs in your browser
🔬 ScienceFree
Radiometric age calculator
Equal amounts of parent and daughter isotope, a ratio of 1, with a decay constant of 0.1 per year give an age of 6.9314718056 years, exactly one half-life.
S
Runs in your browser
🔬 ScienceFree
Uranium-lead radiometric age calculator
A 206Pb/238U ratio of 0.1 gives an age of roughly 614 million years with the Steiger and Jäger 1977 decay constant.
P
Runs in your browser
🔬 ScienceFree
Refrigerant leak CO2 equivalent calculator
A 2.5 kg refrigerant leak with a global warming potential of 1430 equals 3575 kg, or 3.575 tonnes, of CO2 equivalent.
B
Runs in your browser
🔬 ScienceFree
Relative humidity from specific humidity
At sea level, a specific humidity of 0.0072 kg/kg at 20 °C and 1013.25 hPa means a vapor pressure near 11.7 hPa against a saturation pressure near 23.4 hPa…
P
Runs in your browser
🔬 ScienceFree
Richter magnitude from amplitude calculator
A 1 mm trace amplitude recorded 100 km from the epicentre gives a local magnitude of 3, after a distance correction of 3.
K
Runs in your browser
🔬 ScienceFree
Atmospheric scale height calculator
Air at 288.15 K with a mean molar mass of 0.0289644 kg/mol under 9.80665 m/s² of gravity has a scale height of a little over eight kilometres, shown in metres…
K
Runs in your browser
🔬 ScienceFree
Seawater density calculator from salinity, temperature and pressure
Seawater at 35 PSU and 15 °C has a density of 1025.972754 kg/m³ at the surface and 1030.657561 kg/m³ under 1000 dbar, roughly 1000 metres down.
F
Runs in your browser
🔬 ScienceFree
Sediment compaction porosity calculator
Sand starting at 0.5 porosity, buried 2 km with a compaction coefficient of 0.5 per km, keeps just over eighteen percent pore space, a little over a third of…
P
Runs in your browser
🔬 ScienceFree
Sediment Accumulation Rate Calculator
12.5 metres of sediment between horizons dated 18,500 and 6,000 years before present built up over 12,500 years, an average of 1 millimetre per year.
F
Runs in your browser
🔬 ScienceFree
Radiation shielding half-value layer calculator
A shield three half-value layers thick, 7.5 against a half-value layer of 2.5 in the same unit, cuts an intensity of 1000 to 125: a transmission of 0.125 and…
K
Runs in your browser
🔬 ScienceFree
Significant wave height calculator
Paste the wave heights from a record and get Hs, the average of the highest third: nine waves topped by 2.4, 2.1 and 1.8 give an Hs of 2.1 in the same unit.
P
Runs in your browser
🔬 ScienceFree
Snow-to-liquid ratio calculator
At a 10:1 ratio, 0.5 inches of liquid water becomes 5 inches of snow; enter a measured snow depth instead and you get the ratio that actually fell.
P
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.