All tools
Pick a tool by topic, enter your numbers and get a clear result you can copy or print. Nothing you type leaves your browser.
Browse by category
Home & DIY
Calculators for home improvement projects: how much material to buy for decks, fences, walls, floors, tiles, windows and garden walls.
17 tools
Crafts & Sewing
Quantity calculators for sewing, quilting and knitting projects: fabric, binding and yarn.
6 tools
Kitchen & Food
Cooking helpers: scale recipes, convert cups to grams and plan a week of meals.
5 tools
Time & Work
Tools for working hours and meetings: add up timesheets and see what a meeting costs.
6 tools
Text & Data
Quick text and list utilities: sort lines and compare two lists.
2 tools
Web & Dev
Small helpers for web developers and designers, such as unit converters.
2 tools
Images & Files
Private image helpers that run in your browser: add a watermark to many photos, hide part of a screenshot or split a photo into grid tiles. Your files are never uploaded.
3 tools
Audio & Video
Small helpers for audio and music: measure a song's tempo by tapping. Everything runs in your browser.
1 tool
Money & Shopping
Everyday money and shopping helpers: split a restaurant bill, compare unit prices, share trip costs and write a check amount in words. Plus a tire size comparison for car owners.
5 tools
General Tools
Handy calculators and utilities that do not belong to a single topic.
2 tools
Every tool
Deck Board Calculator: How Many Boards, and Which Lengths to Buy
Enter your deck size and get a board buy list by length, a cut plan with staggered joints, the layout drawn to scale, joist and screw counts. Feet or metres. Runs in your browser.
Fence Picket and Post Calculator: Pickets, Posts, Rails and Concrete
Plan a fence run by run: posts, pickets, rails cut from stock lengths, concrete bags and a drawing of every run with gates. Feet or metres. Runs in your browser, nothing is uploaded.
Wallpaper Calculator: How Many Rolls, with a Strip-by-Strip Plan
Enter your walls, doors and windows and the roll size and pattern repeat. Get the rolls to buy, every strip drawn on each wall, and a cut plan for each roll. Feet or metres. Runs in your browser.
Post and Footing Concrete Calculator: How Many Bags for Your Holes
Count the concrete bags and gravel for fence post or deck footing holes. Pick up your fence or deck plan, set hole size and depth, get a buy list and a drawing. Runs in your browser.
Deck and Fence Stain Calculator: How Many Gallons from Your Plan
Turn a deck or fence plan into the area to stain and the gallons to buy: tops, edges, railing, stairs, pickets on both sides, posts and rails, with coats and a range. Runs in your browser.
Tile Calculator with Grout and Thinset: How Much Should You Buy?
Enter the surface, tile size and joint width. Get tiles with waste, boxes, grout bags and thinset bags in one buy list, plus a to-scale layout drawing. Feet or metres. Runs in your browser.
Flooring Calculator: How Many Boxes Do You Need?
Add up to three rectangles for an L-shaped room, pick a straight, diagonal or herringbone layout for the waste, and get the number of flooring boxes to buy. Feet or metres. Runs in your browser.
Curtain Size Calculator: How Wide and How Long?
Enter your window, rod height and the look you want. Get the rod width, number of panels, finished length and cut size, with a to-scale window drawing. Inches or millimetres. Runs in your browser.
Fabric Yardage Calculator: How Much Fabric to Buy for Your Project
List your pieces and the fabric width. Get the yards or metres to buy, with seam allowance, shrinkage and a to-scale cutting layout across the bolt. Inches or millimetres. Runs in your browser.
Retaining Wall Block Calculator: Blocks, Caps, Base and Drainage Stone
Enter wall length, height and block size. Get blocks, caps, base gravel, drainage stone and drain pipe in one buy list, with a course-by-course profile drawing. Feet or metres. Runs in your browser.
Quilt Backing Calculator: Backing, Batting and Binding Yardage
Enter your quilt size and fabric width to get the backing yardage, the batting size and the binding yardage in one result. Inches and yards or centimetres and metres. Runs in your browser.
How Much Yarn Do I Need? Estimate Yardage and Skeins
Enter the finished size of a flat knit or crochet piece, the yarn weight and the length of one skein. Get the yardage, the number of skeins and a shopping list. Runs in your browser.
Cups to Grams Converter: Flour, Sugar, Butter and More
Convert cups, tablespoons, teaspoons or ml to grams for a chosen ingredient, or grams back to cups. Includes a quick table for common measures. Approximate values. Runs in your browser.
Recipe Scaler: Double, Halve or Resize a Recipe
Paste your ingredient list, enter the old and new number of servings, and get every amount scaled with friendly fractions and tidy units. Optional ml and grams. Runs in your browser.
Printable Weekly Meal Planner with a Shopping List
Build a weekly meal planner grid, type your meals, and get a printable plan plus a shopping list added up from the items in each meal. Copy, print or download a CSV. Runs in your browser.
Timesheet Hours Calculator: Add Up Your Week
Add up hours worked from start times, end times and unpaid breaks. Get each day, the weekly total, decimal hours and the part over your weekly limit. Runs in your browser.
Compare Two Lists: Find What Is in One and Not the Other
Paste two lists and see the items only in A, only in B, in both, and all together, with counts and a copy button for each. Runs in your browser, nothing is uploaded.
Sort Lines Alphabetically, Naturally, by Number or by Length
Paste a list and sort the lines A to Z, by natural number order, by the number at the start, or by length. Remove repeats and blank lines, then copy the result. Runs in your browser.
PX to REM Converter: Pixels, rem and em for Your Base Size
Convert px to rem and em, or rem and em back to px, for the root size you use. Get a table of common sizes you can copy into your CSS. Runs in your browser.
Meeting Cost Calculator: What Does This Meeting Cost?
Work out what a meeting costs from the number of people, an hourly cost you type and the length. See cost per minute and run a live meter. Runs in your browser.
Weekly Shift Schedule Maker: Build the Grid and Spot Gaps
Make a printable weekly shift schedule for a small team. Type each person's shifts, see weekly hours per person and get a warning for any half hour with too few people on duty. Runs in your browser.
Chore Rotation Chart Maker: A Fair Weekly Rota
Make a printable rotating chore chart for your household. Add people and chores with a difficulty score, pick the number of weeks and check that everyone gets a similar load. Runs in your browser.
Baseboard Calculator: Linear Feet, Boards to Buy and a Cut List
Add up several rooms, leave out the doors, and get the linear feet of baseboard plus how many 8, 12 or 16 ft boards to buy, with a cut list that keeps joints to a minimum. Feet or metres.
Paint Calculator for a Room: Gallons for Walls, Ceiling and Trim
Work out how much paint a room needs: walls minus doors and windows, ceiling and trim, each with its own coats, rounded to cans you can buy, with an optional cost. Feet or metres, gallons or litres.
Drywall Calculator: How Many Sheets, plus Screws, Compound and Tape
Enter a room's walls and ceiling, or an area you already have, and pick 4x8, 4x10 or 4x12 ft (or 1200 mm) sheets. Get the sheet count with waste, plus screws, joint compound and tape. Feet or metres.
Paver Calculator: How Many Pavers, plus Base Stone and Sand for a Patio
Count the pavers for a patio, plus base stone, bedding sand, joint sand and edge restraint, layer by layer. Add waste and see a purchase list in tons or tonnes. Feet or metres. Runs in your browser.
Gravel Driveway Calculator: How Many Tons, Yards and Truckloads
Work out the tons of gravel for a driveway or path: base layer plus surface layer, a compaction allowance, cubic yards, truckloads and an optional cost. Tapered drives supported. Feet or metres.
Baking Pan Size Converter: How Much Batter for a Different Pan
Compare two baking pans by floor area to see how much to multiply a recipe, how deep the batter will be and an approximate baking time window. Works with 9x13, 8x8, round and loaf pans.
Party Food Calculator: How Much Food for Your Guests
Enter guests and the type of party to get a general guide to appetizers, main dish, sides, dessert and drinks, in pounds or kilograms, plus a multiplier for your own recipes. Runs in your browser.
Tape Measure Fraction Calculator: Add, Subtract and Cut in 1/16 Inch
Add and subtract feet, inches and fractions down to 1/64 in, plan cuts from stock boards with saw kerf, and convert decimals to the nearest tape mark. Runs in your browser.
Crochet Blanket Size Calculator: How Many Chains and Rows
Pick a standard blanket size, enter your swatch gauge and get the foundation chain, number of rows and finished size, then open the Yarn Amount Calculator with the blanket already filled in.
Knitting Gauge Calculator: Adjust a Pattern to Your Gauge
Enter the pattern gauge and your swatch gauge, paste the stitch and row counts from the pattern and get new counts that give the same finished size. Links on to the Yarn Amount Calculator.
Ring Size Converter: US, UK, EU and Japan, Plus a Printable Sizer
Convert a ring size between US, UK, EU and Japan, or turn a finger measurement into a size. Includes a printable sizer with a card-width scale check. Chart values are unverified. Runs in your browser.
Business Days Calculator: Add Working Days or Count Them
Add or subtract working days from a date, or count the working days between two dates. You choose the days off and type your own holidays. No holiday data is built in. Runs in your browser.
Pond Liner Size Calculator: Liner, Volume and Pump Flow
Work out the liner size for a garden pond from its length, width, depth and edge overlap. Also get a water volume estimate, a planting shelf allowance and a pump flow. Runs in your browser.
Batch Photo Watermark: Add Text to Many Photos in Your Browser
Add a text watermark to up to 20 photos at once, in one position or tiled across the photo, with a live preview. Photos are processed in your browser and never uploaded. Saves new copies.
Screenshot Redaction: Hide Part of an Image in Your Browser
Cover names, numbers or faces in a screenshot with pixelated blocks or a solid black box. Your image is processed in your browser and never uploaded. Saves a new copy and leaves the original alone.
Split a Photo into Numbered Grid Tiles in Your Browser
Cut one photo into a 3 x 3 or any grid of equal tiles, numbered, with the order to post them. Runs in your browser: the photo is never uploaded. Saves new files.
WCAG Color Contrast Checker: Ratio and the Closest Color That Passes
Check the WCAG contrast ratio of a text and background color for AA and AAA, then get the closest lighter or darker color that passes. Runs in your browser.
Meeting Time Zone Planner: Find a Time That Works Across Time Zones
Enter your time zone and the time zones of the people you meet with, and see every start hour side by side, who is inside working hours, and a shareable link. Runs in your browser.
Board and Batten Spacing Calculator: Equal Gaps, Cut List and Wall Drawing
Enter a wall size, batten width, wanted gap and any doors or windows. Get equal batten spacing, a cut list, the stock boards to buy and a wall drawing. Runs in your browser.
Cross Stitch Fabric Size Calculator: Finished Size and Fabric to Cut
Enter pattern stitches and fabric count to get the finished design size, the fabric to cut with margins, and the same pattern on other Aida and linen counts. Runs in your browser.
Raised Bed Soil Calculator: How Much Soil, and Bulk or Bags?
Enter several raised beds and their depths. Get the soil volume, a topsoil, compost and aeration split, the bags needed, and a bulk versus bag cost comparison from your prices. Runs in your browser.
Road Trip Fuel Cost Calculator: Fuel, Tolls and Cost per Person
Work out what a road trip will cost in fuel and split it between passengers. Use miles or km, mpg or L/100 km, round trips, several vehicles and tolls.
Split Bill With Tip Calculator: Itemised Shares With Tax and Tip
Split a restaurant bill by item. Add what each person ordered, share dishes equally, and spread tax and tip in proportion. Copy a message to send the group.
Tap Tempo BPM Counter: Tap to the Beat and Read the BPM
Tap along with a song to measure its tempo in beats per minute. Shows half and double time, the time per beat and how steady your taps are. Runs in your browser; nothing is recorded.
Check Amount to Words Converter: Write the Amount on a Check
Turn a dollar amount into the words for the written-amount line of a check, such as One thousand two hundred thirty-four and 56/100. Choose capitals and cents style.
Unit Price Comparison Calculator: Price per Ounce, Gram or Litre
Compare up to six products by price per ounce, gram, litre or item, even when sizes are in different units. Add multipacks and coupons to see which is cheaper.
Tire Size Comparison Calculator: Compare Two Sizes Side by Side
Compare two tire sizes such as 225/45R17 and 245/40R18: overall diameter, sidewall height and how far the speedometer reading would be off. Reference only.