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
Rabbit gestation calculator
A doe mated on 1 March 2026 is due to kindle on 1 April 2026, 31 days later, the textbook average for domestic rabbits.
S
Runs in your browser
🔬 ScienceFree
Sod calculator
A 50 by 20 lawn with 120 of patio and beds leaves 880 to cover, which is 88 rolls on 2 pallets: the calculator subtracts every obstacle before counting turf.
S
Runs in your browser
🔬 ScienceFree
Cost of owning a dog calculator
Over a 12-year life, a dog's food, vet care and supplies are paid 12 times while the purchase or adoption fee is paid once: the calculator adds it all up and…
S
Runs in your browser
🔬 ScienceFree
Tree diameter calculator
A tape reading of 100 cm around the trunk gives a diameter at breast height of about 31.83 cm: the calculator divides the girth by pi and returns the diameter…
S
Runs in your browser
🔬 ScienceFree
Tree value calculator
A condition rating of 0.8 keeps 80 % of a tree's basic value: the calculator multiplies trunk cross-sectional area by the species value factor and the condition…
S
Runs in your browser
🔬 ScienceFree
Vegetable yield calculator
A 12 square metre tomato bed at 4.5 kilograms per square metre should give about 54 kilograms of fruit: the calculator multiplies planted area by the yield rate…
S
Runs in your browser
🔬 ScienceFree
Wastewater BOD removal efficiency calculator
Influent BOD of 250 mg/L and effluent of 25 mg/L mean 90 % removal: the calculator compares what enters and leaves the plant and shows the concentration removed…
S
Runs in your browser
🔬 ScienceFree
AI water footprint calculator
A thousand AI queries at half a liter each consume 500 liters of freshwater, or 0.5 cubic metres: enter your own query count and the intensity from your source…
S
Runs in your browser
🔬 ScienceFree
Carrying capacity calculator
One thousand tonnes of winter forage at four tonnes per animal supports 250 animals: divide any limiting resource by the use per individual to get the…
S
Runs in your browser
🔬 ScienceFree
COVID lockdown pollution calculator
A city that went from ten million to four million vehicle-kilometres at 0.32 g of NOx per kilometre avoided 1,920 kg of NOx: turn a traffic drop into grams…
S
Runs in your browser
🔬 ScienceFree
Eco-friendly bags
Fifty-two plastic bags at 1.6 units each total 83.2, fifty-two paper bags at 5.5 total 286 and one reusable tote at 40 totals 40, so the tote ranks first…
S
Runs in your browser
🔬 ScienceFree
Global plastic policy calculator
A country generating ten million tonnes of plastic a year that adopts a 25 percent cut removes 2,500,000 tonnes and is left with 7,500,000: turn a policy…
S
Runs in your browser
🔬 ScienceFree
Kaya identity calculator
One hundred people at 50 of GDP each, an energy intensity of 2 and a carbon intensity of 0.5 give emissions of 5,000: see which of the four Kaya drivers moves…
S
Runs in your browser
🔬 ScienceFree
Meat carbon footprint calculator
Eating 1.5 kg of beef a week at 27 kg of CO2e per kilogram adds up to 2,106 kg of CO2e a year: enter your own weekly amount and factor to compare beef, pork or…
S
Runs in your browser
🔬 ScienceFree
Passive house heating savings
A 150 m² home in a cold climate with average insulation saves 17,568 kWh of heating a year as a Passive House.
S
Runs in your browser
🔬 ScienceFree
Reduce your plastic
Swapping 7 bottles, 4 bags, 3 straws, 2 cups, 1 takeaway container and 5 utensils a week for reusables avoids 165.76 g of plastic a week, more than 8 kg a year.
S
Runs in your browser
🔬 ScienceFree
Tap water calculator
A kitchen tap at 8 liters per minute running 15 minutes a day uses 120 liters daily and 43,800 liters a year.
S
Runs in your browser
🔬 ScienceFree
Tree benefits calculator
Ten street trees at 22 kg of CO2 and 118 kg of oxygen each per year absorb 220 kg of CO2 and release 1180 kg of oxygen.
S
Runs in your browser
🔬 ScienceFree
Wind turbine energy calculator
An 80 m rotor in a steady 10 m/s wind with a power coefficient of 0.4 delivers over a million watts and more than ten million kWh a year.
S
Runs in your browser
💰 Finance & moneyFree
Attrition rate calculator
Twelve departures with an average headcount of 80 is an attrition rate of 15%. Enter the leavers and the average workforce for any period and get the percentage…
S
Runs in your browser
💰 Finance & moneyFree
AVC calculator
Spend 1,200 on materials, labor and energy to make 100 units and your average variable cost is 12 per unit.
S
Runs in your browser
💰 Finance & moneyFree
Basis point converter
Twenty-five basis points are 0.25%, or 0.0025 as a decimal, and 100 basis points are exactly 1%. Turn any rate move or spread into the percent and decimal your…
S
Runs in your browser
💰 Finance & moneyFree
Stock beta calculator
Stock returns of 0.10, 0.20 and 0.30 against market returns of 0.05, 0.10 and 0.15 give a beta of 2: the stock moved twice as far as the index.
S
Runs in your browser
💰 Finance & moneyFree
Billable hours calculator
Forty hours worked at 150 an hour with two hours written off gives 38 billable hours and an invoice total of 5,700.
S
Runs in your browser
💰 Finance & moneyFree
Biweekly mortgage calculator
A 300,000 mortgage at 6.5% over 30 years is paid off in 24 years and 2 months with half-payments every two weeks, saving 88,119.97 in interest.
S
Runs in your browser
💰 Finance & moneyFree
Black Friday calculator
A list price of 100 cut to 70, plus a 10% coupon, ends at 63: you save 37, a true 37% off the original.
S
Runs in your browser
💰 Finance & moneyFree
Boat loan calculator
Financing 45,000 for a boat at 7.5% over 120 months means a monthly payment of 534.16, 64,098.96 paid in total and 19,098.96 in interest.
S
Runs in your browser
💰 Finance & moneyFree
Bradford factor calculator
Three separate absences adding up to 10 days give a Bradford factor of 90, because the number of spells is squared before multiplying by the days.
S
Runs in your browser
💰 Finance & moneyFree
Build Back Better tax calculator
Under the 2021 Build Back Better proposal, a single filer with 50,000 of taxable income would owe 6,617 in federal income tax, at a 22% marginal rate.
S
Runs in your browser
💰 Finance & moneyFree
Business budget calculator
Planned income of 60,000 from product sales and retainers, against 31,650.5 of rent, payroll, supplies and marketing, leaves a net balance of 28,349.5 for the…
S
Runs in your browser
💰 Finance & moneyFree
CAC calculator
Spending 50,000 on sales and marketing to win 200 new customers means a customer acquisition cost of 250 each.
S
Runs in your browser
💰 Finance & moneyFree
California stimulus check calculator
A single filer with 40,000 of California adjusted gross income and one dependent would have received 700 from the 2022 Middle Class Tax Refund: 350 base plus…
S
Runs in your browser
💰 Finance & moneyFree
UK capital gains tax calculator
A 20,000 gain with a 3,000 annual exempt allowance leaves 17,000 taxable; a basic-rate taxpayer selling shares or other assets pays 18%, which is 3,060.
S
Runs in your browser
💰 Finance & moneyFree
Car depreciation calculator
A car bought for 30,000 that loses 15% of its value each year is worth 13,311.16 after 5 years, or 44.3705% of its price, after 16,688.84 of depreciation.
S
Runs in your browser
💰 Finance & moneyFree
Car interest calculator
Finance 25,000 at 6.5% over 60 months and you pay 4,349.22 in interest on top of the car, at 489.15 a month.
S
Runs in your browser
💰 Finance & moneyFree
Carry trade calculator
Borrow 100,000 at 0.5%, invest it at 4.5%, lose 1.2% on the currency, and the carry trade still earns 2,746, a 2.746% net return.
S
Runs in your browser
💰 Finance & moneyFree
Cash flow to debt calculator
Operating cash flow of 200,000 against total debt of 1,000,000 gives a cash flow to debt ratio of 0.2, so one period of cash from operations covers a fifth of…
S
Runs in your browser
💰 Finance & moneyFree
Cash ratio calculator
Cash of 50,000 plus 30,000 in cash equivalents against 100,000 of current liabilities gives a cash ratio of 0.8, so the most liquid assets cover 80% of…
S
Runs in your browser
💰 Finance & moneyFree
Child tax credit calculator
Two qualifying children on a single return with 80,000 of adjusted gross income are worth a 4,400 child tax credit under the 2025 and 2026 rules.
S
Runs in your browser
💰 Finance & moneyFree
COGS calculator
Open with 20,000 of stock, buy 80,000, close with 15,000, and your cost of goods sold is 85,000. Enter the opening inventory, net purchases and closing count of…
S
Runs in your browser
➗ MathFree
Mode calculator
In 1, 2, 2, 3 and 4 the mode is 2, which appears twice. Every value is counted, all values tied for the top count are returned, and a list where each number…
S
Runs in your browser
➗ MathFree
Normal distribution calculator
On the standard normal curve the density at 0 is about 0.3989, the height of the bell's peak. Choose density or cumulative probability, enter the value, mean…
S
Runs in your browser
➗ MathFree
Ordering numbers
Enter 3, 1/2, -2.5, 4 and 7/4 and get -2.5, 1/2, 7/4, 3, 4: each entry is turned into its real value, so fractions and decimals line up correctly, and your…
S
Runs in your browser
➗ MathFree
Permutation without repetition
Choosing and ranking 3 of 5 items can be done in 60 different orders, the value of P(5,3). Enter how many distinct items you have and how many places to fill…
S
Runs in your browser
➗ MathFree
Point estimate calculator
For the sample 12, 15, 18, 21 and 24, the point estimate of the population mean is 18. Paste your sample and choose the mean, a proportion, the variance or the…
S
Runs in your browser
➗ MathFree
Three events probability calculator
For the classic set with P(A) of 0.5, P(B) of 0.4 and P(C) of 0.3, plus their overlaps, the chance that at least one occurs is 0.8.
S
Runs in your browser
➗ MathFree
Range calculator
For the list 3, 7, 2, 9 and 5 the range is 7: the maximum 9 minus the minimum 2. Paste any numbers, negatives and decimals included, and get the count, the…
S
Runs in your browser
➗ MathFree
Relative standard deviation
A standard deviation of 2.5 on a mean of 50 is an RSD of 5 %. Enter the two summaries you already hold and get the spread as a percentage of the mean, ready for…
S
Runs in your browser
➗ MathFree
Roulette payout calculator
25 chips on red with 7 as the winning number pay 25 and bring 50 chips back to you. Name the bet, the stake and the pocket that landed on a single-zero wheel…
P
Runs in your browser
➗ MathFree
Sampling error calculator
A sample mean of 52 against a population mean of 50 is a sampling error of +2, so the sample overestimates.
S
Runs in your browser
➗ MathFree
Sensitivity and specificity calculator
90 true positives, 10 false negatives, 80 true negatives and 20 false positives give a sensitivity of 90 % and a specificity of 80 %.
P
Runs in your browser
➗ MathFree
Simpson's diversity index
Counts of 10, 20, 5 and 15 give 50 individuals in four species and a diversity index just above seven in ten: the chance that two random individuals differ.
S
Runs in your browser
➗ MathFree
Stem-and-leaf plot calculator
Seven scores from 12 to 31 become three rows, and stem 2 holds the leaves 1, 3, 3 and 5 for the values in the twenties.
P
Runs in your browser
➗ MathFree
Third quartile calculator
Find the third quartile of a list in one step: for the values 1 to 8, Q3 is 6.25, the point with three quarters of the data at or below it.
S
Runs in your browser
➗ MathFree
Two envelopes paradox calculator
See the arithmetic behind the two envelopes paradox: keeping the opened envelope is worth exactly what you saw, while switching appears worth 1.25 times as much…
S
Runs in your browser
➗ MathFree
Uniform distribution calculator
Enter the bounds of a continuous uniform distribution and get the essentials: on 0 to 10 the mean is 5, the density is 0.1 and the chance of a value at or below…
P
Runs in your browser
➗ MathFree
Upper and lower fence calculator
Find the cut-offs that flag outliers in a box plot: for the numbers 1 to 9, Q1 is 2.5, Q3 is 7.5 and the fences fall at −5 and 15, so any value outside them…
S
Runs in your browser
➗ MathFree
Wilcoxon rank-sum test calculator
Compare two independent groups without assuming a normal distribution: for samples of 5 and 6 values that do not overlap, the rank sum of the first is 45, the…
P
Runs in your browser
➗ MathFree
Z-test calculator
Check whether a sample mean fits a hypothesized mean when the population standard deviation is known: a mean of 105 against 100, with a standard deviation of 15…
S
Runs in your browser
🔬 ScienceFree
Allele frequency calculator
Count genotypes, get allele frequencies: 320 AA, 160 Aa and 20 aa individuals hold 1000 gene copies, so p is 0.8 and q is 0.2, adding to one.
A
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.