🧮Calculators
Calculators cover finance, health, math, physics, engineering and everyday life: interest and loans, net salary, BMI, rule of three, conversions and more. Results are informational and educational — for important decisions, confirm with a professional and official sources.
2826 tools
Garden Watering Time Liters
Calculates watering time to deliver a target amount of liters given a flow rate.
NPK Fertilizer for Plant Pot
Calculates grams of granular NPK fertilizer based on pot volume and plant type.
Plant Pruning Frequency by Type
Recommended pruning interval by plant type (shrub, lawn, fruit tree, rose).
Mortar Mix Calculator
Calculate the cement and sand needed for a mortar or render mix from the volume and the ratio. Buy the right amount of material for the job.
Bricks for Wall
Calculates how many bricks are needed to build a wall given dimensions.
Hedge Plants per Meter
Calculates number of hedge plants for a given length and spacing.
Cistern Volume in Liters
Calculates capacity in liters of a rectangular cistern from its dimensions.
Seedlings per Hectare Calculator
Calculate how many seedlings fit in one hectare from the spacing between rows and plants. Plan planting and seedling purchases for your crop.
Cat Age in Human Years
Convert your cat age to human years using the standard veterinary table. Find out which life stage your feline is really in.
Dog Food Calculator
Calculate how many grams of dry food to give your dog per day, based on its weight and activity level. Keep feeding portions just right.
Cat Food Quantity by Weight
Calculates daily grams of dry food for a cat by weight and life stage.
Cat Litter Quantity per Month
Estimates kilograms of cat litter consumed per month per adult cat.
Pet Daily Water Calculator
Calculate how many milliliters of water per day your dog or cat should drink based on weight. Keep them hydrated and notice when intake is off.
Dog Bath Frequency by Coat
Recommended interval between dog baths based on coat type and activity.
Pet Dewormer Dose by Weight
Calculates number of dewormer tablets given pet weight and per-tablet coverage.
Tropical Fish Aquarium Temperature
Recommended water temperature range for common tropical aquarium species.
Aquarium Fish Feed Quantity
Estimates daily dry food in grams for aquarium fish based on count and average size.
Kennel Minimum Area by Dog Size
Calculates minimum kennel area based on dog size and number of animals.
Daily Dog Walk Time by Breed Energy
Suggests daily walk time based on dog breed energy level and age.
Overdraft Interest Calculator
Calculate how much overdraft interest you pay based on the days used and your bank monthly rate. See the real cost of one of the most expensive forms of credit.
CDB vs Savings Account
Compares net return of post-fixed CDB to savings over a chosen period.
CDB Net Redemption (IOF + Tax)
Calculate how much you get back when redeeming a CDB, after the IOF (redemption under 30 days) and the regressive income tax based on the holding period.
LCI/LCA vs Equivalent CDB
Shows the gross CDB rate needed to match a tax-free LCI/LCA yield.
REIT Dividend Yield
Calculates annualized dividend yield of a Brazilian REIT from monthly distribution and share price.
Stock Dividend Yield Calculator
Calculate the annual dividend yield (DY) of a stock by dividing last year dividends by the current share price. Compare the income return of each holding.
Day Trade Tax Calculator (BR)
Calculate income tax on day trade gains on the Brazilian stock market (20% on profit), including the 1% withholding. Know how much to pay each month.
Swing Trade Income Tax BR Stocks
Calculates 15% tax on swing trade gains accounting for the R$20,000 monthly exemption.
REIT Capital Gains Tax
Calculates 20% income tax on capital gains from selling Brazilian REIT shares.
Retirement Goal Monthly Contribution
Calculates monthly contribution to reach a retirement goal with compound interest.
50/30/20 Monthly Budget
Splits monthly net salary into 50% needs, 30% wants, 20% savings.
Backpacker Trip Budget by Days
Estimates total backpacking trip budget from daily spend and number of days.
Flight Ticket Cost Comparison
Compares flight ticket costs for routes and dates based on per-leg price.
Recommended Carry-on Time at Brazilian Airports
Estimates total wait time with carry-on at Brazilian airports before boarding.
Recommended Online Check-in Time Before Flight
Shows recommended advance time for online check-in before domestic or international flights.
International ATM Withdrawal Cost with IOF
Calculates total cost of international ATM withdrawal with 1.1% IOF tax on commercial rate.
Low-cost vs Conventional Travel Savings
Shows savings from choosing low-cost travel (hostel, street food, public transport) over conventional.
Clothing Quantity for Trip by Days
Estimates clothing pieces to pack for a trip based on number of days.
Jet Lag Recovery Time by Time Zones
Estimates days to recover from jet lag based on number of time zones crossed.
Time Zone of Countries vs Brazil
Shows hour difference between Brazil (UTC-3) and selected world cities.
Airport-City Distance and Time BR
Estimates distance in km and travel time between Brazilian airports and city centers.
Countries Visited in a Lifetime Goal
Shows how many countries you can visit based on trips per year and current age.
Trip Photos and Storage Needed in GB
Estimates trip photo count and storage needed in GB.
Airbnb vs Hotel Lodging Budget
Compares total lodging cost between Airbnb and hotel for a number of nights and guests.
Daily Cattle Feed by Weight
Calculates daily concentrate and forage feed in kg for cattle based on live weight.
Eggs per Laying Hen per Year
Estimates annual egg production per laying hen from daily average and dozens per month.
Cow Milk Liters per Day
Estimates daily milk liters per dairy cow by breed and management level.
Pasture Hectares for Cattle Herd
Calculates hectares of pasture needed for a cattle herd based on stocking rate.
NPK Fertilizer Amount per Crop
Estimates kg of NPK fertilizer per hectare based on selected crop (soy, corn, coffee).
Crop Harvest Time in Months
Shows months between planting and harvest for major Brazilian crops.
Soybean Yield in Bags per Hectare
Calculates total soybean bag production from yield per hectare and planted area.
Corn Yield in Bags per Hectare
Calculates total corn bag production from yield per hectare and planted area.
Coffee Yield in Bags per Hectare
Calculates total coffee bag production from yield per hectare and planted area.
Planting Density by Crop in cm
Shows recommended spacing between plants and rows in centimeters for several crops.
Irrigation Water Amount per Crop
Estimates liters of water per hectare per day for irrigation by crop type.
Eucalyptus Seedlings per Hectare
Calculates eucalyptus seedlings per hectare based on 3x2 or 3x3 meter spacing.
Pasture Area Needed per Head of Cattle
Calculates hectares of pasture needed per head of cattle based on AU/ha stocking rate.
Student Final Grade Average by Quarters
Calculates student final average from term grades entered.
Brazilian Grade to US Letter Conversion
Converts Brazilian grade 0-10 to US school system letter concept.
Weighted School Average with Weights
Calculates weighted school grade average with different weights per assessment.
Minimum School Attendance for Approval in Brazil
Calculates minimum attendance hours for 75% required by Brazilian LDB law.