Todas as calculadoras de Cotidiano38 calculadoras

Utilitários práticos para o dia a dia

• Tip CalculatorCalculate the tip amount and total bill per person, with smart service-quality presets and rounding options.
• Split the Bill CalculatorSplit a bill fairly between friends, with optional tip and separate handling of shared vs personal items.
• GPA CalculatorCalculate your grade point average on a 4.0 scale from course grades and credit hours, with cumulative GPA support.
• Grade CalculatorFind what you need on the final exam to reach your target course grade, based on current grade and exam weight.
• Unit Price CalculatorCompare prices per unit (per oz, per liter, per piece) to find the best value between different package sizes.
• Electricity Cost CalculatorEstimate what any appliance costs to run from its wattage, hours of use, and your rate.
• Cooking Time CalculatorEstimate roasting time and temperature for meat by weight and doneness.
• Pregnancy Due Date CalculatorEstimate your due date from the first day of your last menstrual period.
• Sleep Cycle CalculatorFind the best times to wake up or fall asleep based on 90-minute sleep cycles.
• Random Picker CalculatorDraw unique random numbers from any range — perfect for raffles and games.
• Paper Size CalculatorGet dimensions and pixel sizes for A4, Letter, A3 and other paper formats at any DPI.
• Tip Split CalculatorSplit the bill and tip between friends in seconds, with per-person totals.
• Age Gap CalculatorFind the exact age difference in years, months, and days between two people.
• Bra Size CalculatorFind your band and cup size from underbust and bust measurements.
• Ring Size CalculatorConvert finger circumference or diameter to US, UK, and EU ring sizes.
• Password Strength CalculatorEstimate password entropy in bits and crack time at a trillion guesses per second.
• Random Number GeneratorGenerate random integers in any range — fair dice rolls, draws, and picks.
• Screen Size & PPI CalculatorPixels per inch, total pixels, and physical dimensions from any screen's resolution and diagonal.
• Reading Time CalculatorHow long it takes to read any text by word count and reading speed — from slow study to fast skimming.
• Typing Speed CalculatorConvert words typed, time, and errors into gross and net WPM plus accuracy.
• Aspect Ratio CalculatorScale width and height to any aspect ratio — perfect for video, prints, and responsive design.
• Tire Size CalculatorDecode tire spec numbers into diameter, sidewall, circumference, and revs/mile — and compare two sizes before you buy.
• Horsepower CalculatorConvert between horsepower, watts, kilowatts, and metric PS — plus torque/rpm to horsepower.
• Commute Cost CalculatorAdd up the true daily, monthly, and yearly cost of your commute — fuel, parking, tolls, and public transport fares side by side.
• Parking Cost CalculatorCompare hourly, daily, and monthly parking rates, and see what regular parking really costs you per year.
• Pet Food Cost CalculatorEstimate how much feeding your dog or cat costs per day, month, and year from food price, bag size, and daily portion.
• Water Bill CalculatorEstimate your water bill from meter readings or usage, including sewer and fixed charges, and see what each habit costs.
• Laundry Cost CalculatorWork out the true cost per load of laundry — water heating, electricity, detergent, and machine wear — plus your yearly laundry spend.
• Subscription Cost CalculatorAdd up every recurring subscription — streaming, apps, cloud, gym — and see the startling monthly and lifetime totals.
• Toilet Paper Duration CalculatorSee how many days your toilet paper stash will last, how many rolls each person burns through monthly, and when to restock.
• Home WiFi Bandwidth CalculatorAdd up your household's simultaneous streaming, gaming, and video calls to see the Mbps you truly need — and whether your plan keeps up.
• Device Battery Life CalculatorEstimate how long a battery lasts from its capacity and device power draw — phones, laptops, drones, or IoT sensors — plus recharge cycles and lifespan.
• Grocery Budget CalculatorBuild a realistic grocery budget from your household size, diet style, and shopping habits — with a weekly, monthly, and yearly view plus cost-saving targets.
• Lawn Mowing Cost CalculatorEstimate what mowing your lawn should cost — by area or by the hour — and compare a pro service against doing it yourself over a full season.
• Snow Removal Cost CalculatorEstimate professional snow clearing cost per storm and per season — by driveway size, snow depth, and contract style — and weigh it against shoveling yourself.
• Dry Cleaning Cost CalculatorTotal your dry cleaning and laundry-out bill — per visit, per month, and per year — based on your wardrobe mix and how often pieces go back for service.
• Coffee Cost CalculatorSee what your daily coffee really costs — café habit vs home brewing vs pod machines — per month, per year, and per decade.
• Haircut Cost CalculatorTotal your yearly grooming spend across household members — salon vs barbershop vs DIY clippers — and see decade costs and cheaper alternatives.