Concrete Mix Calculator - Online Cement Sand Gravel Ratio Tool
Calculate required bags of cement, sand, and gravel for a given concrete volume using standard mix ratios (1:2:4, etc.). Supports metric and imperial.
UD5 Toolkit
Calculate required bags of cement, sand, and gravel for a given concrete volume using standard mix ratios (1:2:4, etc.). Supports metric and imperial.
Calculate cubic yards or meters for various shapes (rectangular slab, circular column, trapezoidal footing). Local math tool.
When a yarn is discontinued, find equivalent alternatives by matching weight and gauge. Local reference.
Select a tool (VS Code, Figma, etc.) and get random shortcut prompts. Press the keys to practice.
Test min, max, and step constraints on `<input type='number'>`. See how invalid values are handled. Undocumented behavior.
Perform common percentage calculations: find percent of a number, percentage increase/decrease, and more. Simple, fast, and always available for free.
Enter spring constant and displacement to find force and stored energy. Visual compression.
Select tea type and get recommended steeping time & temperature. Start a visual countdown with an alert. Make every cup perfect. No ads, local.
Enter number of eyelet pairs and lacing style to find the correct shoelace length in inches/cm. Never buy too short.
Enter a URL and trace the full redirect chain, seeing each hop's status code and location. Identify unnecessary redirects. Client-side fetch.
Estimate daily hay and grain needed for a horse based on weight and workload. Follows 2% body weight rule. Educational reference.
Find the CAGR of an investment given start and end values over a time period. Instant growth rate.
Mix your own feed by entering grain percentages and see the resulting crude protein. Formulate a balanced diet for your flock.
Choose your tea type and start a precise steeping timer with color‑changing background. Never over‑steep again.
Calculate airflow in cubic feet per minute given velocity and duct diameter. Simple HVAC reference. Local only.
Enter mold dimensions or water weight to get total resin needed, including Part A and B.
Project how your savings and investments grow over time with compound interest. Interactive chart and detailed table. Free and anonymous.
Visual chart showing the typical colors a bruise goes through from red to yellow. Educational only.
Calculate water and soda ash needed to pre‑soak fabric for tie‑dye. Achieve vibrant, long‑lasting colors.
Enter a dataset to compute Q1, median, Q3, IQR, and highlight outliers. Visual box plot generated in canvas.
Compute simple interest and final amount given principal, annual rate, and duration. Also reverse-calculates rate or time. Local only.
Enter a hook size in any system and instantly see the equivalent in all other standards.
Find essential Visual Studio Code shortcuts for Windows, Mac, and Linux. Filter by category. Boost your coding speed with this reference.
Calculate dehydrating time based on meat slice thickness and desired texture. Countdown timer with reminders.
Calculate how much liquid fertilizer concentrate to add per gallon of water based on desired N concentration.
Set up high-intensity interval training rounds with work and rest periods. Audio alerts and customizable sets. Runs in background, no download.
Visual guide to identify root-bound plants. Calculates next pot size up. Keep indoor plants healthy.
Compare common knots by their efficiency percentage and residual strength. Interactive chart with animated diagrams.
Schedule your iron supplement away from inhibitors (coffee, calcium). Visual reminder and log.
Enter a Sudoku puzzle and watch it solved step-by-step with techniques explained. Learn solving strategies. Local only.