Toolnido
Free, private calculators and everyday utilities for home projects, crafts, cooking, work and text. They run in your browser.
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
Tools
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.