UD5 Toolkit
Bolognese Meat to Sauce Ratio – Online Perfect Consistency
Calculate the exact amount of crushed tomatoes needed for a given weight of ground meat. Achieve the perfect ragu thickness.
Online Calculators - Math & More
99+ toolsCyclical Diet Macro Splitter – Online High/Low Day Calorie Allocator
Enter weekly calorie target and training days to split into high‑carb/low‑carb days. For cyclical ketogenic or carb cycling.
Barbell Plate Load Calculator – Online Weight Room Math
Enter target total weight and bar weight to see which plates to put on each side. No more counting errors.
Ski Binding DIN Calculator – Online Weight, Height, BSL, Skier Type
Enter your weight, height, boot sole length, and skier type to see the recommended DIN release setting.
Bow Sight Pin Gap Estimator – Online Multi‑Pin Setup Tool
Enter your first pin distance and arrow speed to estimate gaps for 30, 40, 50, 60 yard pins. Start practice.
SCUBA Gas Consumption Planner – Online SAC Rate & Tank Volume
Enter your Surface Air Consumption rate and planned depth to estimate how long a cylinder will last. Dive safely.
D&D Magic Item Price Calculator – Online by Rarity & Edition
Select item rarity and consumable state to get a price range based on Dungeon Master's Guide tables. Quick reference.
Pan Flute Pipe Length Calculator – Online Note & Diameter to cm
Calculate the tube length for each note of a pan flute given inner diameter. Build your own instrument.
Airlock Activity Rate Estimator – Online Bubbles per Minute to CO2
Count bubbles per minute to estimate fermentation activity and approximate sugar consumption. Simple conversion.
Overgrip Length Calculator – Online Racket Handle Wrapping
Measure your handle circumference and preferred overlap to see how long your overgrip tape needs to be.
Golf Handicap Differential Calculator – Online Score to Index
Enter adjusted gross score, course rating, and slope to calculate the round's handicap differential. Track your index.
Kayak Weight Capacity Calculator – Online Paddler + Gear Limit
Enter kayak's maximum capacity and your weight to see remaining capacity for gear. Safety on the water.
Necktie Length Calculator – Online Knot, Height & Collar Style
Enter your height, knot type (Four‑in‑Hand, Windsor) and collar to predict ideal tie length. Avoid too short or long.
Drumstick Balance Calculator – Online Tip & Taper Preference
Compare stick models by length, diameter, and taper. Find the perfect balance for your playing style.
Carbonation Level Calculator – Online PSI & Temp for Soda
Find the correct regulator pressure to achieve a desired carbonation volume in your home soda keg. Spritzig or flat.
Drip Irrigation Emitter Calculator – Online Flow Rate & Run Time
Enter number of emitters and their GPH to calculate total water delivered and optimal run time for your plants.
Sheet Metal Bend Allowance Calculator – Online K-Factor Tool
Calculate developed length for a bend. Enter thickness, angle, inside radius, and K-factor. Essential for metalworking.
Clamp Capacity Planner – Online Number & Size for Glue-Ups
Enter panel dimensions and get recommended number of clamps and throat depth. Achieve even pressure.
Airbrush Paint Thinner Calculator – Online Acrylic/Enamel Ratio
Select paint type and brand to get the recommended thinning ratio for airbrush. Achieve smooth, clog-free spraying.
Tree Planting Offset Calculator – Online How Many Trees to Neutralize Flight
Enter flight distance to see estimated CO2 emissions and how many trees it would take to absorb that over 10 years.
Daily Virtual Water Tracker – Online Diet & Habits Footprint
Select your average daily meals and habits to see how much virtual water you consume. Environmental awareness tool.
Canine Weight Pull Class Estimator – Online Breed & Body Weight
Enter your dog's weight to see which weight‑pull class they would compete in and approximate pulling capacity.
Surfboard Volume Estimator – Online Dimensions to Liters
Enter length, width, thickness to approximate surfboard volume. Compare to your ideal volume based on weight.
Shabbat Candle Lighting Time Calculator – Online Zip/Coordinates
Enter your zip code or coordinates to get sundown minus 18 minutes for candle lighting. Works offline once location set.
Nectar Flow Potential Calculator – Online Forage Radius & Bloom
Estimate potential honey yield by entering hive count, forage radius, and bloom type. Educational for beekeepers.
Discus Optimal Release Angle Calculator – Online Physics Estimator
Enter release height and speed to compute the optimal launch angle for maximum distance. Simple projectile model.
Djembe Rope Tension Calculator – Online Knots & Length
Estimate how much rope you need to restring a djembe and the number of verticals. Get traditional Mali weave instructions.
Friendship Bracelet Thread Length Calculator – Online by Pattern
Select bracelet type (chevron, candy stripe) and enter rows to estimate total embroidery floss needed per color. Reduce waste.
Ukulele String Tension Calculator – Online Note & Gauge Balance
Select tuning, scale length, and string gauge to calculate total tension on the neck. Build custom string sets.
Felting Shrink Calculator – Online Predict Wool Felted Size
Knit a swatch, measure before and after felting, and let this tool calculate the shrink percentage. Plan your felted projects accurately.
Paw Balm Ingredient Ratio Calculator – Online DIY Healing Salve
Enter desired balm hardness and get the ratio of beeswax to shea butter and coconut oil. Soothe cracked pads.
Prayer Time Calculator – Online Solar‑Based Angles & Coordinates
Enter coordinates and calculation method to estimate Islamic prayer times. Runs entirely in the browser. No internet needed.
Wing Loading Calculator – Online Skydiving & Paragliding Safety
Enter your exit weight and canopy size to calculate wing loading. Helps determine if you're within the safe recommended range.
Quilt Binding Yardage Calculator – Online Bias & Straight Grain
Enter quilt perimeter, binding width, and seam allowance to get the exact fabric yardage for either straight‑grain or bias binding.
Event T‑Shirt Quantity Calculator – Online by Size Distribution
Enter expected number of attendees and a distribution model to estimate how many shirts to order per size.
Refinance Breakeven Calculator – Online Savings vs. Costs
Enter current and new loan details plus closing costs to see how many months to break even on a refinance.
Fertilizer Burn Recovery Protocol – Online Flush Calculator
Calculate water volume for flushing soil based on pot size. Includes recovery timeline reminders.
Cabinet Hardware Placer – Online Even Spacing Calculator
Enter cabinet width and find optimal placement for knobs or pulls. Visual layout with grid. Achieve professional look.
Sleeping Bag Comfort Rating Calculator – Online Personalize
Adjust a sleeping bag's EN rating based on sleeping pad R‑value, clothing, and personal warmth.
Coffee Ratio Calculator - Online Perfect Pour Over & French Press
Calculate coffee grounds and water needed for any brew method (SCA golden ratio). Adjust strength. Convert grams to tablespoons. Local only.
Trip Budget Calculator - Online Estimate Travel Costs by Category
Plan your travel budget by entering flights, accommodation, meals, activities, transport. See cost breakdown and per-person share. Fully local.
Recipe Scaler - Online Multiply Ingredients for Any Servings
Paste a recipe ingredient list and double, triple, or scale to any serving size. Rounds fractions intelligently. Save your scaled recipes locally.
Terrarium Layer Calculator – Online Drainage, Charcoal, Soil Depth
Enter container height and get recommended depths for each layer (drainage rock, charcoal, moss, soil). Build a healthy miniature ecosystem.
Christmas Light String Calculator – Online Feet & Outlets
Enter roof line or tree height and get the length of light strings needed. Estimate power draw.
Deck Baluster Spacing Calculator – Online Even Gap
Enter total rail length and baluster width to get exact spacing for code compliance. Visual layout.
Molecular Mass Calculator – Online Enter Formula H2O
Type a chemical formula like NaHCO3 and get molar mass, element breakdown. Educational.
Bird Age Converter - Online Parakeet & Cockatiel to Human
Convert popular pet bird ages (budgie, cockatiel, macaw) to human years. Lifespan reference included. Fun educational tool.
Guinea Pig Age Converter - Online Cavvy Human Years Tool
Convert guinea pig age to approximate human years. Cute facts included. For guinea pig lovers. 100% local.
Aquarium Volume Calculator - Online Rectangular & Bow Front Tank
Calculate water volume for rectangular, bow-front, and cylindrical tanks. Also computes weight of water. Supports inches/cm. Useful for dosing treatments.
Tile Coverage Calculator - Online Floor & Wall Quantity Estimator
Calculate number of tiles needed for a floor or wall, including waste percentage. Supports different tile sizes. No upload, instant results.
Mat Border Proportion Calculator – Online Golden Ratio & Standard
Enter frame and art size to get equal or weighted mat borders. See a golden ratio option for an artistic touch.
Camp Stove Fuel Calculator – Online Days Left per Canister
Enter isobutane canister weight, meal count, and burn time per meal to estimate how many days your fuel will last. Plan your resupply.
Fermentation Salinity Calculator – Online Kimchi & Sauerkraut Brine
Calculate the salt percentage by weight for your vegetable ferments. Avoid mushy or unsafe ferments. Supports both dry salting and brine methods.
Radioactive Decay Calculator – Online Half‑Life & Age
Enter the initial amount, half‑life, and time to find remaining quantity. Nuclear science helper.
Pet Food Cost Calculator – Online Per Day & Brand Comparison
Enter bag weight, price, and daily cups to find daily cost. Compare two brands.
Indoor Greenhouse Humidity Calculator – Online Misting Schedule
Enter target RH and room temp to estimate how often to mist or run a humidifier. Quick reference.
Old Seed Viability Estimator – Online How Many to Plant
Enter seed type and age to estimate germination percentage. Adjust number of seeds to sow.
Picture Hanging Height Calculator – Online Eye‑Level Guide
Find the ideal height to hang art based on wall and furniture dimensions. Follow gallery standard 57‑inch center rule.
Insulation R-Value Calculator - Online Building Thermal Envelope Tool
Compare insulation materials and thicknesses to achieve a target R-value. Understand U-factor. Educational home improvement tool. Local.
Crystal Load Capacitance Calculator - Online Pierce Oscillator Tool
Calculate load capacitors for a crystal oscillator given stray capacitance and crystal CL. Essential for microcontroller circuit design. Local.