Compost Ratio Calculator – Online Brown/Green Balance Tool
Adjust material types (leaves, grass) to achieve the ideal 30:1 C:N ratio. Improve compost bin performance. Local only.
UD5 Toolkit
Adjust material types (leaves, grass) to achieve the ideal 30:1 C:N ratio. Improve compost bin performance. Local only.
Calculate board feet for dimensional lumber and generate a cut list with waste factor. Quick carpentry tool.
Create your own oral rehydration solution by mixing salt, potassium, and sugar to WHO formula. Convert to teaspoon amounts.
Estimate total fuel cost for a road trip. Enter distance, vehicle MPG or L/100km, and fuel price. See cost per person for sharing. Simple & local.
Estimate the fuel cost for a trip based on distance, vehicle mileage, and fuel price. Supports multiple units (miles, km, liters, gallons).
Build and test regular expressions against sample text. Real-time match highlighting, capture groups display, and flavor options. All inside your browser.
Select drip speed or running toilet and see gallons wasted per day and annual cost. Fix leaks!
Select rice type and number of cups to get exact water measurement. Perfect fluffy rice every time.
Paste your SQL query and check for basic syntax errors. Highlights missing commas, wrong keywords. Local analysis.
Plan your travel budget by entering flights, accommodation, meals, activities, transport. See cost breakdown and per-person share. Fully local.
Keep score for candlepin bowling with its unique rules. No strike carries automatic strikes. For New England enthusiasts.
Paste JavaScript and catch syntax errors instantly with line numbers. Lightweight pre‑commit check. Local.
Check if your A/B test results are statistically significant using chi-squared test. Enter visitors & conversions for control/variant. Results in plain English.
Calculate salt to warm water ratio for effective gargle. Also ginger and honey tea prep. Simple first aid.
Enter your car's make and model to find the minimum and maximum rotor thickness specs. Static lookup table. Local reference.
Convert between common cooking units: cups, tbsp, tsp, ml, grams (for water/flour/sugar), ounces. Quick reference for international recipes.
Convert speed units such as miles per hour, kilometers per hour, knots, and meters per second. Accurate and quick, works offline in your browser.
Compute the error function and complementary error function for any real x. Quick and precise. Pure frontend math.
Create the perfect brine for refrigerator pickles. Adjust ratios by weight. Quick and safe recipe tool.
Enter recent scores, course rating, and slope to estimate a golf handicap index. Simple formula for unofficial tracking. Local only.
Convert between whole fruit, juice volume, and zest quantity. Never wonder how many lemons for 1/4 cup.
Convert dog years to human years using the updated 2019 formula that accounts for breed size (small, medium, large). More accurate than 7:1.
Paste HTML and detect unclosed tags, invalid nesting, and duplicate IDs. Lightweight client‑side validation.
Scale a jerky marinade recipe based on meat weight. Includes optional cure #1 calculation for safety.
Convert between common cooking units: cups → grams, teaspoons → ml, Fahrenheit → Celsius. Essential baking tool.
Calculate liquid or tablet dosage for dogs/cats based on weight and prescribed mg/kg. Check your vet's math. Educational, always consult vet.
Validate YAML syntax with line‑by‑line error messages. Also format messy YAML into clean, indented output. All in your browser.
Change the sample rate of an audio file (e.g., 48kHz to 44.1kHz) without leaving the browser. Ideal for podcast prep.
Enter your bag dimensions and compare against major airline carry-on and checked limits. Visual pass/fail gauge. Avoid gate fees.
Find the right heater wattage for your fish tank based on volume and desired temperature rise. Simple rule-of-thumb calculator. Local only.