Free Online Calculators
All 138 calculators on Tooliro, sorted by topic. Each one explains the formula it uses. Looking for name ideas, plans or checklists instead? See the generators and planners.
Home & Cleaning
Cleaning Product Dilution Calculator
Pick a dilution ratio such as 1:10, 1:30 or 1:50, or enter your own, and the total amount. Get the mL of concentrate and of water.
Shower Water Cost Calculator
A 10-minute shower uses 20 to 25 gallons. Enter minutes, showerhead and the price on your water bill to see the cost per shower, month and year.
Home Cleaning Time Estimator
Enter the size of your home in square feet, the mess level and the type of cleaning to estimate how long the job takes.
Vampire Energy Calculator (Standby Power Cost)
Enter the standby watts of a device and your electricity rate to see what phantom power costs you per day, month and year.
Kitchen Appliance Counter Space Planner
Select the appliances you keep on the counter and how many of each to get the total counter space they need.
Home Humidity Target Calculator
Pick the season and enter your current humidity to get the target range for your home and what to set on a humidifier or dehumidifier.
Laundry Load Size Calculator
Pick the machine type, the fabric and the soil level to see the right load size and how full to fill the drum.
More: AC BTU Calculator, Clothing Laundry Care Symbol Decoder, Home Energy Usage Estimator, Water Hardness to Soap Ratio Calculator, Water Filter Replacement Interval Estimator, Should I Repair or Replace Appliance Calculator, Mattress Lifespan & Sagging Risk Calculator
Furniture & Moving
Yard Sale Pricing Calculator
Suggests a tag price from the price new and the condition, with a price chart, typical prices for common items and a printable price list.
Small Space Furniture Fit Visualizer
Enter the dimensions of the furniture and of your doorway and hallway to check whether a sofa or wardrobe fits through before you buy.
Furniture Assembly Time Calculator
Pick brand, item type and complexity and get an estimate of how long the assembly takes, from an IKEA bookshelf to a bed frame.
Moving Truck Size Estimator
Enter the number of boxes and furniture pieces to see which U-Haul or rental truck size fits your move.
Shelf Weight Capacity Estimator
Enter material, thickness, span, width and supports to estimate the safe load of a shelf and how far it bends.
Lease vs Buy Furniture Cost Calculator
Compare the cost of leasing or rent-to-own furniture with buying it. Enter price, monthly payment and term to see the difference and the break-even point.
Room Design
Paint Color Lighting Preview
Enter a paint color as a HEX code and see how it looks under warm light, cool light and daylight before you buy.
Rug Size Visualizer for Your Room
Enter room and rug dimensions and see the rug drawn to scale in the room, with room area, rug area and coverage. Free, nothing to upload.
Bedroom Furniture Layout Planner
Enter room width, room length and bed size to check whether the furniture fits and get layout recommendations for the space that is left.
Room Paint Calculator
Enter room length, width and ceiling height, windows, doors and coats to get the paint and primer you need for walls and ceiling.
More: Paint Coverage Estimator
Crafts & Making
Essential Oil Dilution Calculator
Enter the dilution in percent and the amount of carrier oil in mL to get the essential oil in drops and in mL.
Candle Wick Size Selector
Enter the jar diameter and pick the wax (soy, paraffin, beeswax, coconut) to get the wick series and the sizes to test first.
Reed Diffuser Oil Ratio Calculator
Enter the bottle size in mL and the fragrance strength to get the amounts of fragrance oil and carrier oil for a reed diffuser.
Epoxy Resin Mixing Ratio Calculator
Enter the mix ratio of your resin (1:1, 2:1, 3:1 or any other) and the total amount in grams to get the exact amounts of resin and hardener.
Candle Wax Melt Time Calculator
Enter the candle diameter to see how long the first burn takes to reach a full melt pool, and the burn rate per hour.
Body Measurements to Clothing Pattern Converter
Enter your bust, waist and hip measurements to get sewing measurements and pattern adjustments for your body shape.
Yarn Gauge Converter for Knitting and Crochet
Your gauge differs from the pattern? Enter both gauges to get the adjusted stitch and row counts for knitting or crochet.
Soap Superfat Calculator
Enter the total oil weight and the lye you used to get the superfat percentage of your cold process soap.
Candle Wax and Fragrance Oil Calculator
Enter the container volume and the fragrance load in percent to get the exact amount of wax and fragrance oil for your candle.
Sewing Pattern Scale Converter
Enter the original and the desired pattern scale to get the percentage to print at, plus the adjusted measurement.
Hair & Beauty
Hair Dye Fade Timeline Calculator
Pick the type of dye, your hair porosity and how often you wash to see how long your hair color lasts before it fades.
Hair Developer Mixing Ratio Calculator
Pick 1:1, 1:2, 1:3 or a custom ratio and the total amount in grams. Get the exact grams of bleach powder, dye or toner and of developer.
Haircut Maintenance Schedule Estimator
Pick your hairstyle and how fast your hair grows to see how many weeks to leave between trims.
Shower Temperature Recommendation Tool
Pick your skin type, your hair goal and the time of day to get a recommended shower water temperature.
Wardrobe
Closet Storage Capacity Calculator
Enter the length, width and depth of a shelf and the type of clothing to estimate how many items your closet shelf holds.
Cost Per Wear Calculator for Clothing
Enter the price and how often you expect to wear an item to get its cost per wear and a value score.
Clothing Size Converter
Convert clothing and shoe sizes between US, UK, EU and Japan, for women's and men's tops and pants, dresses and shoes.
Baking
Bread Dough Rising Time Calculator
Bread dough rises in 1 to 3 hours at room temperature and 8 to 12 in the fridge. Enter temperature and yeast for an estimate, with a table by temperature.
Yeast to Sourdough Conversion Calculator
Enter flour, water and yeast of a recipe to get the amount of sourdough starter, the adjusted flour and water and the longer rise time.
Sourdough Hydration Calculator
Enter flour and water in grams to get the hydration of your sourdough or bread dough in percent, with the recommended range.
High Altitude Baking Calculator
Enter your altitude, the type of recipe, oven temperature and baking time. Get the adjusted temperature, time and ingredient changes for high altitude.
More: Cookie Dough Chilling Time Estimator, Oven Temperature Conversion Calculator
Cooking & Coffee
Meal Prep Portion Container Planner
Enter your daily calories and meals per day to get calories and grams per meal and the container size to buy for meal prep.
Coffee Grind Size and Grinder Setting Calculator
Pick the roast level and the brewing method, from espresso to French press and cold brew, and get the grind size and a grinder setting to start with.
Air Fryer Wattage and Cooking Time Calculator
Adjust air fryer cooking times to the wattage of your model. Pick the food or enter the recipe time and get the time for your air fryer.
Fermentation Brine Calculator
Enter the vegetable weight and the salinity in percent (usually 2 to 3%) to get the salt in grams and ounces for sauerkraut and kimchi.
Sweetener Conversion Calculator
Convert an amount of sugar into honey, maple syrup, agave, stevia or another sweetener, or the other way round, at the same sweetness.
Leftovers Shelf Life Calculator
Pick the food, fridge or freezer, and the days since cooking to see whether leftovers are still safe and how many days remain.
Cold Brew Coffee Ratio Calculator
Enter the coffee in grams and pick a strength: 1:8 strong, 1:10 normal or 1:12 mild. Get the water you need and the brew time.
More: Food Fermentation Temperature Planner, Wedding Guest Alcohol Calculator, Slow Cooker to Instant Pot Conversion Calculator, Coffee Roast Level Converter, Tea Steep Time Calculator, Air Fryer Conversion Calculator, Marinade & Brining Time Calculator, Recipe Portion Size Converter
Garden & Plants
Window Sunlight Exposure Estimator
Pick the direction a window faces (north, south, east or west) and the season to see the hours of sunlight per day and the light intensity.
Plant Watering Frequency Calculator
Pick the plant, the pot size and your climate to see how many days to leave between waterings.
Houseplant Fertilizer Dilution Calculator
Enter the amount of water and the dilution ratio (1:10, 1:20 and so on) to get the exact amount of liquid fertilizer and avoid fertilizer burn.
Tomato Growing Start Date Planner
Enter your last frost date to see when to start tomato seeds indoors and when to transplant them outside.
Garden Soil Mix Ratio Calculator
Enter the total volume in litres to get the amounts of peat moss, compost and perlite for a potting mix.
Plant Repotting Pot Size Calculator
Enter the diameter of the current pot to get the pot size to move up to. The rule of thumb: 1 to 2 inches wider.
Pets
Cat Years to Human Years Calculator
Convert your cat's age to human years and see its life stage. With a chart from kitten to 20 years and the formula behind it.
Pet Grooming Cost Estimator
Pick breed size, coat type and service to get an estimated grooming price with the usual range and what the service includes.
Cat Feeding Amount Calculator
Enter your cat's weight and age to get the daily food amount in grams. A starting point to adjust with your vet and the label on the food.
More: Pet Medication Dosage Calculator, Pet Adoption Lifetime Cost Estimator, Dog Calories Per Day Calculator, Dog Age Converter (Human Years), Dog Food Portion Calculator, Pet Pregnancy Due Date Calculator
Aquarium
Aquarium Filter Size Calculator
Enter your tank size and fish load to get the filter flow rate you need in litres and gallons per hour, with the turnover rate.
Aquarium Heater Size Calculator
Enter tank size, room temperature and target water temperature to see how many watts your aquarium heater needs.
Aquarium Stocking Level Calculator
Enter tank volume, filtration and fish type to estimate the bioload capacity and how many fish your aquarium can hold.
Fish Compatibility Checker
Pick two aquarium fish, such as betta, guppy, tetra or angelfish, and get a compatibility score from 0 to 100 with an assessment.
More: Aquarium Water Change Calculator, Aquarium Light Duration Calculator
Fitness & Health
Audio Frequency Hearing Test
Find the highest tone you can hear and play any frequency from 20 to 20,000 Hz with the tone generator.
Workout Time Calculator
Add your exercises with sets, reps and rest and see how long the whole workout takes.
Calorie Burn Calculator for Household Chores
Pick a chore, enter the minutes and your weight and see the calories burned by cleaning, vacuuming, gardening and other housework.
Daily Light Exposure Planner
Enter wake time, bedtime and work schedule and get a plan for when to seek sunlight and when to dim the lights for better sleep.
More: Running Pace to Heart Zone Calculator, Running Injury Risk Estimator, Child Growth Percentile Calculator, Sleep Environment Score Calculator, Protein Intake Planner by Lifestyle, Sleep Time Calculator, TDEE (Simplified) Calorie Calculator, Water Intake Calculator
Money & Housing
Car Lease Buyout Calculator
Compare the residual value in your lease with the car's current market value to see whether buying out your lease is a good deal.
Property Tax Increase Estimator (After Purchase)
Enter purchase price, tax rate and years of ownership to estimate your annual and monthly property tax after the home is reassessed.
HOA Fee Breakdown & True Cost Calculator
Enter the monthly HOA fee, your mortgage payment and the years you plan to stay to see the cost per day and year and the share of your mortgage.
Commercial Kitchen Rental Cost Calculator
Compare renting a commercial kitchen with setting up your home kitchen: cost per hour, setup cost and the break-even point.
Shipping Carrier Rate Comparison Calculator
Enter weight, dimensions and distance to compare estimated shipping costs across USPS, UPS, FedEx and DHL and find the cheapest carrier.
Student Housing Cost Calculator: Dorm vs Apartment
Compare the monthly and yearly cost of a dorm with a meal plan against an apartment with rent, utilities, groceries and commute.
Car Battery Health Estimator
Enter the age of your car battery and your climate to estimate its health, the remaining life and when to plan a replacement.
Contract Cancellation and Early Termination Fee Calculator
Enter the months left, the penalty in percent and the annual cost to see what cancelling a gym, phone or lease contract early costs.
Employee vs Contractor Cost Comparison Tool
Enter hourly rate, hours per week and weeks per year. Compare the annual cost of an employee, with payroll taxes, benefits and overhead, to a contractor.
Relocation Salary and Cost of Living Calculator
Enter your salary and the rent, grocery and transport costs of both places to see the salary you need after moving.
More: Car Maintenance Timeline Customizer, Car Insurance Deductible Break-Even Calculator, Car Loan Affordability Calculator, Podcast Equipment ROI Calculator, Email Newsletter Growth Projection Calculator, Time-to-Save Calculator (Irregular Income), Holiday Gift Budget Splitter, Budget Hourly Rate Calculator
Tech
3D Printing Time Estimator
Estimate how long a 3D print takes from the layer height and the height of the model. A quick check before you slice. Free, no sign-up.
Phone Screen Replacement Cost Estimator
Pick your phone model to see what a screen replacement costs, with the usual price range for iPhone, Samsung Galaxy and Google Pixel.
Screen Viewing Distance and FOV Calculator
Enter screen type, size and resolution to get the optimal, minimum and maximum viewing distance and the field of view.
Home Office Internet Speed Calculator
Enter users, video calls, streams, downloads and gaming at the same time to get the download and upload speed your home office needs.
Drone Flight Time Estimator
Enter the battery capacity in mAh and the weight of the drone in grams to estimate the flight time per charge.
Camera Settings Recommender
Pick the lighting and the subject and get a starting point for ISO, shutter speed and aperture. A cheat sheet for manual mode.
More: Home Office Ergonomics Calculator, Phone Storage Cleanup Planner
Travel & Outdoors
Travel Budget Calculator
Enter the length of the trip and pick budget, mid-range or luxury travel to estimate what the trip will cost.
Solar Panel Angle Calculator
Enter your latitude to get the best solar panel tilt angle for the whole year and for summer, winter, spring and fall.
Hiking Time Estimator
Enter the distance in km and the elevation gain in metres to estimate how long a hike takes.
RV Propane Burn Time Calculator
Pick the tank size (20, 30 or 40 lb) and the appliance or its BTU per hour to see how many hours and days your propane lasts.
Van-Life Solar Calculator
Select your appliances and the hours you use them per day to get the solar panel size and battery capacity your camper van needs.
More: Posture-Friendly Backpack Fit Calculator, Backpack Weight Calculator
Everyday
Movie Runtime and End Time Calculator
Enter the start time and the runtime to see when a movie ends, in 12-hour and 24-hour time.
Chord and Music Key Transposer
Enter your chords, pick the original and the target key and get every chord transposed. A free music key transposer for any instrument.
Reading Time Calculator
Enter a word count and a reading speed to see how long a text takes to read. For articles, speeches and study material.
Social Media Screen Time Goal Planner
Enter your current and target daily screen time and the number of weeks to get a week-by-week plan to cut social media use.
Age Gap Calculator
Enter two ages and get the age gap in years and as a percentage, plus who is older. For couples, siblings and friends.
More: BPM Tap Tempo Tool