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.
🏠 Home, food & hobbiesFree
Paver gravel base calculator
Square feet times inches of compacted depth, divided by 324, gives the cubic yards of crushed stone to order: a 200 sq ft patio on a 4-inch base needs just…
S
Runs in your browser
🏠 Home, food & hobbiesFree
Pergola lumber calculator
A 12 by 10 ft pergola with rafters every 2 ft needs 4 posts, 2 beams of 12 ft and 7 rafters of 10 ft, 13 pieces in all.
A
Runs in your browser
🏠 Home, food & hobbiesFree
Picture rail calculator
A room with a 48 ft perimeter and 6 ft of door openings needs 42 linear feet of picture rail. Subtract the doorways, add an allowance for miters if you want…
S
Runs in your browser
🏠 Home, food & hobbiesFree
Popcorn ceiling area calculator
A 20 by 12 ft ceiling needs 5.52 gallons of soak water for two passes with a 15% margin, so you have 6 ready.
A
Runs in your browser
🏠 Home, food & hobbiesFree
Rafter count calculator
A 40 ft ridge with rafters every 2 ft needs 42 common rafters, because there are 21 stations including both gable ends and each one takes a pair.
A
Runs in your browser
🏠 Home, food & hobbiesFree
Rafter overhang length calculator
A 24 in eave projection at a 6/12 pitch needs about 26.8 in of rafter tail, because the board is cut along the slope, not along the plan.
P
Runs in your browser
🏠 Home, food & hobbiesFree
Rebar weight calculator
120 ft of #5 bar at 1.043 lb per foot weighs 125.16 lb. Enter the bar size label, the total length from your schedule and the unit weight from your table to get…
P
Runs in your browser
🏠 Home, food & hobbiesFree
Roof batten calculator
A 2,000 sq ft roof plane with a 40 ft eave and battens at 16-inch centres takes 38 rows, 1,520 linear feet before waste.
P
Runs in your browser
🏠 Home, food & hobbiesFree
Roof dead load calculator
Architectural asphalt shingles on 7/16 OSB over 2x6 rafters at 16 inches, plus felt, come to a dead load of 5.9 psf.
A
Runs in your browser
🏠 Home, food & hobbiesFree
Roof pitch multiplier calculator
A 6/12 pitch has a slope multiplier of about 1.118, the factor that turns a floor plan area into the roof surface for shingles, underlayment and panels.
S
Runs in your browser
🏠 Home, food & hobbiesFree
Roofing felt underlayment calculator
A 2,000 sq ft roof with 10% waste needs 2,200 sq ft of underlayment, which is 5.5 rolls at 400 sq ft each, so you buy 6 and have 200 sq ft to spare.
S
Runs in your browser
🏠 Home, food & hobbiesFree
Spray foam insulation calculator
Reaching R-21 over 1,200 sq ft with open-cell foam rated R-3.7 per inch takes just under six inches of foam; with 10% waste that is 38 kits of 200 board feet.
P
Runs in your browser
🏠 Home, food & hobbiesFree
Stair headroom calculator
A 2800 mm storey climbed at 32° under a 3600 mm stairwell opening clears the 2032 mm minimum. Enter height, pitch and opening length to check the clearance at…
P
Runs in your browser
🏠 Home, food & hobbiesFree
Stair stringer length calculator
A flight that climbs 2800 mm over a 3500 mm run needs a stringer longer than either side: the calculator gives that exact diagonal length and the pitch angle…
S
Runs in your browser
🏠 Home, food & hobbiesFree
Starter strip shingle calculator
80 ft of eaves and 40 ft of rakes with 3 ft pieces and 5% waste take exactly 42 starter strips. The calculator adds both edges, applies the waste and rounds up…
A
Runs in your browser
🏠 Home, food & hobbiesFree
Tile spacer calculator
100 tiles laid with cross spacers need about 100 spacers, or 110 with the default 10% spare margin, because each cross serves four corners.
S
Runs in your browser
🏠 Home, food & hobbiesFree
TPO membrane roll calculator
A 2,500 sq ft flat roof covered with 10 by 100 ft rolls and a half-foot seam lap needs 3 whole rolls, because each roll really covers 950 sq ft.
P
Runs in your browser
🏠 Home, food & hobbiesFree
Trim paint calculator
120 linear feet of 3.5-inch trim with 2 coats at 400 sq ft per gallon needs 0.175 gallons, so one quart covers it.
S
Runs in your browser
🏠 Home, food & hobbiesFree
Vinyl plank flooring calculator
A 25 m² room with cartons covering 2 m² each and the default 10% waste needs 14 boxes of vinyl plank: 27.5 m² to cover, rounded up to whole cartons.
P
Runs in your browser
🏠 Home, food & hobbiesFree
Wall plate lumber calculator
48 ft of wall framed with one bottom and two top plates needs 144 linear feet of plate, 151.2 with 5% waste, which is 13 boards of 12 ft.
P
Runs in your browser
🏠 Home, food & hobbiesFree
Wall sheathing calculator
1,280 sq ft of exterior wall with 120 sq ft of doors and windows leaves 1,160 sq ft to cover: with 4×8 sheets and 10% waste you need 40 sheets, rounded up so…
A
Runs in your browser
🏠 Home, food & hobbiesFree
Wallpaper paste calculator
6 rolls at 0.5 litres of paste each, plus the usual 10% for mixing losses, need 3.3 litres, so you buy 4 packs of 1 litre.
P
Runs in your browser
🏠 Home, food & hobbiesFree
Water heater sizing calculator
A household of four with a 70-gallon morning peak on an electric heater needs a 50-gallon tank. Enter how many people live at home, the busiest-hour demand if…
P
Runs in your browser
🏠 Home, food & hobbiesFree
Wire ampacity calculator
Copper wire of 12 AWG with 75 °C insulation is rated for 25 amps. Pick the gauge, the temperature class and copper or aluminum to read the reference table value…
A
Runs in your browser
🏠 Home, food & hobbiesFree
Wire resistance run calculator
30 meters of 12 AWG copper wire add 0.152322331834 ohms one way, and twice that for the go-and-return loop of a single-phase circuit.
P
Runs in your browser
➗ MathFree
Collatz sequence calculator
Start from any positive whole number and watch the Collatz rule run to 1: from 6 the path is 6, 3, 10, 5, 16, 8, 4, 2, 1, taking 8 steps and peaking at 16.
S
Runs in your browser
➗ MathFree
GCD and LCM of multiple numbers free
For twelve, eighteen and twenty-four, the greatest common divisor is 6 and the least common multiple is 72, both from one list.
S
Runs in your browser
✍️ Text & AIFree
Atbash cipher encoder/decoder
Hello becomes Svool: Atbash swaps each letter for its mirror in the alphabet, A with Z and B with Y, keeping capitals and leaving digits and punctuation alone.
A
Runs in your browser
📏 Unit convertersFree
Caballería area converter
One Cuban caballería is about 134200 square meters, or 13.42 hectares. Pick the country variant, enter the number of caballerías and get the area in square…
A
Runs in your browser
📏 Unit convertersFree
Cantaro / kantar mass converter
One Genoa cantaro weighs 47.65 kilograms. Pick the Mediterranean port variant, Valencia and the Egyptian kantar included, enter how many you have and get the…
A
Runs in your browser
📏 Unit convertersFree
Chinese chi/cun length converter
One chi is a third of a metre: 33.333333 cm with six decimals. Enter a length in chi and see it in metres, centimetres, millimetres and inches, plus the…
A
Runs in your browser
📏 Unit convertersFree
cmH₂O pressure converter
10 cmH₂O are 980.67 Pa, 9.81 hPa, 7.36 mmHg and 3.94 inH₂O: type a clinical airway pressure in centimetres of water and read all four units side by side…
A
Runs in your browser
📏 Unit convertersFree
Dirham (mass) converter
One classic dirham weighs 2.975 grams. Convert this historical Islamic unit of mass, not the modern currency, into grams, grains and mithqals, choosing the…
A
Runs in your browser
📏 Unit convertersFree
Fanegada area converter
One fanegada of Castile is about 6439.5 m², or 0.644 hectares and 1.5912 acres. Pick your region's variant, because the fanegada is not the same size…
A
Runs in your browser
📏 Unit convertersFree
Firkin (beer) volume converter
One firkin, the classic UK beer cask, holds 9 imperial gallons: 40.9148 litres or about 10.8085 US gallons.
A
Runs in your browser
📏 Unit convertersFree
Geologic rate converter
Put a geologic rate into the unit your source uses: 10 mm per year is 1 cm per year or 0.3937 inches per year.
A
Runs in your browser
📏 Unit convertersFree
Mithqal mass converter
Convert mithqal to grams with a documented constant: one classic mithqal is 4.25 g, which is 4250 mg or about 0.1366 troy ounces, and an Ottoman option uses 4.8…
A
Runs in your browser
📏 Unit convertersFree
Newton temperature scale converter
Read a temperature given in degrees Newton on the scales you know: 33 °N, where water boils, is 100 °C, 212 °F and 373.15 K, and all three results appear…
A
Runs in your browser
📏 Unit convertersFree
Parasang / farsakh converter
One parasang, or farsakh, is 6 km in the default metric table, about 3.728 miles; switch to the historic 5.5 km or 5.6 km tables when your source uses them.
A
Runs in your browser
📏 Unit convertersFree
French toise length converter
1 toise is 1.94903631 m, or 6 pieds de roi, 72 pouces and 864 lignes. Turn a length from a historical French source into metric and imperial units in one step…
A
Runs in your browser
📅 Dates & timeFree
ISO 8601 week number
Enter a date to get its ISO 8601 week number and week-year: 25 July 2026 is in week 30, written 2026-W30, a Saturday.
A
Runs in your browser
🏠 Home, food & hobbiesFree
Fixture unit demand calculator
24 FU on the flush-tank curve give a probable peak demand of 16.615167 gallons per minute, or 62.895248 litres.
S
Runs in your browser
🏠 Home, food & hobbiesFree
Lawn mowing area calculator
A 100 by 50 foot lawn is 5,000 square feet: with a 21-inch push mower it takes 32 passes, 3,200 feet of walking and about 12 minutes at 3 mph.
S
Runs in your browser
🏠 Home, food & hobbiesFree
Overseeding calculator
A 5,000 sq ft lawn overseeded at 3 lb per 1,000 sq ft needs 15 lb of seed. Enter your lawn area and the overseeding rate from the bag or an extension guide, and…
P
Runs in your browser
🏠 Home, food & hobbiesFree
PEX tubing calculator
Eight points of use with an average 25 ft run, each fed by a hot and a cold line, need 400 ft of PEX plus 10% waste: 440 ft in all.
P
Runs in your browser
🏠 Home, food & hobbiesFree
Pipe water weight calculator
A 10 m run of 50 mm pipe filled with water carries almost 20 kg, close to 2 kg on every metre. Enter the inside diameter and length to size hangers, check…
A
Runs in your browser
🏠 Home, food & hobbiesFree
Play sand calculator
An 8 by 8 ft sandbox filled 6 inches deep takes 32 cubic feet of play sand: 3200 lb, or 64 bags of 50 lb.
A
Runs in your browser
🏠 Home, food & hobbiesFree
Raised bed soil calculator
An 8 by 4 ft raised bed filled 1 ft deep takes 32 cubic feet of soil, about 0.906 cubic metres. Enter the inside length, width and fill height in feet, inches…
S
Runs in your browser
🏠 Home, food & hobbiesFree
Septic tank sizing calculator
A 3-bedroom home with 4 occupants needs a 1,250-gallon septic tank: the bedroom table says 1,000 gallons, but 4 people at 150 gallons a day for 2 days need…
A
Runs in your browser
🏠 Home, food & hobbiesFree
Solar panel count calculator
A home using 900 kWh a month with 400 W panels and 4.5 peak sun hours needs 21 panels, about an 8.4 kW system, at the default 80% efficiency.
A
Runs in your browser
🏠 Home, food & hobbiesFree
Sprinkler head count calculator
A 5,000 sq ft lawn with heads that each cover 300 sq ft needs 17 sprinkler heads, with 100 sq ft of spray to spare.
P
Runs in your browser
🏠 Home, food & hobbiesFree
Subpanel feeder calculator
A 60 A subpanel 80 ft from the main panel comes out at 4 AWG copper on an 80 A breaker, with voltage drop well inside the 3% target.
S
Runs in your browser
🏠 Home, food & hobbiesFree
Toilet water usage calculator
Ten flushes a day on a 1.6 GPF toilet use 16 US gallons a day and 5,840 gallons a year, with litres shown alongside.
S
Runs in your browser
🏠 Home, food & hobbiesFree
Transformer sizing calculator
15,000 W of connected load at 240 V single-phase, with a 0.9 power factor, 0.8 demand and the 1.25 continuous factor, calls for a 25 kVA transformer.
P
Runs in your browser
🏠 Home, food & hobbiesFree
Water service line calculator
15 GPM over 80 feet of copper, with 60 psi at the street and 20 psi kept at the house, needs a three-quarter-inch service line.
P
Runs in your browser
🎧 Audio & VoiceFree
Align transcript to SRT timestamps
Each timestamp becomes one numbered SRT cue, and lines wrap at 42 characters by default without splitting words, so a corrected transcript keeps its original…
B
Runs in your browser
🎧 Audio & VoiceFree
Audiobook playback duration calculator
A 10-hour audiobook played at 1.5x takes 400 minutes, or six hours and forty minutes. Enter the listed length in minutes and your player speed to get the real…
F
Runs in your browser
🎧 Audio & VoiceFree
Audio file size calculator
A 180-second recording at 320 kbps comes to about 7.2 MB. Enter the running time in seconds and the target bitrate to check upload limits and storage before the…
R
Runs in your browser
🎧 Audio & VoiceFree
Convert audio channel layout
Going from 5.1 to stereo, the center and each surround reach their side at 0.707 and the LFE is left out.
R
Runs in your browser
🎧 Audio & VoiceFree
Crossfade duration calculator
Clips of 12.5 and 8.25 seconds joined by a 2.75-second crossfade play for 18 seconds in total, overlapping from 9.75 to 12.5 seconds.
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.