🧮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
Dive Decompression Time
Estimates decompression stop time when exceeding no-decompression limit.
Dive Tanks Per Day
Estimates number of dive tanks needed for a day of dives based on planned dives.
Brazilian Architect Fee (CAU)
Computes referential CAU Brazil architect fees for residential projects per square meter.
Brazilian Engineer Fee (CREA)
Computes referential CREA Brazil engineer fees for civil engineering based on area and project type.
Doctor Consultation CBHPM
Computes a Brazilian doctor consultation fee based on the CBHPM table and procedure level.
Dentist Budget CBHPO
Estimates a dentist treatment budget based on the Brazilian dental reference table.
Brazilian Lawyer Fee (OAB)
Computes a referential Brazilian lawyer fee based on case value and OAB minimum table.
Brazilian Physiotherapy Fee (CREFITO)
Computes a referential Brazilian physiotherapy session fee per CREFITO table.
Brazilian Psychologist Fee (CRP)
Computes a referential Brazilian psychology session fee per CRP table.
Speech Therapist Fee (CFFa)
Computes a referential Brazilian speech therapy session fee per CFFa table.
Brazilian Nutritionist Fee (CRN)
Computes a referential Brazilian nutritionist consultation fee per CRN table.
Brazilian Veterinarian Fee (CRMV)
Computes a referential Brazilian veterinarian consultation fee per CRMV table.
Brazilian Pharmacist Fee (CRF)
Computes a referential Brazilian pharmacist service fee per CRF table.
Brazilian Accountant Fee (CRC)
Computes a referential Brazilian accountant monthly service fee per CRC table by company size.
Blood Pressure Classifier (SBC)
Classifies blood pressure (optimal, normal, pre-hypertension, stages 1/2/3) per Brazilian SBC guidelines.
Blood Glucose Classifier (SBD)
Classifies fasting glucose, 2h post-prandial and HbA1c per Brazilian SBD criteria (normal, pre-DM, diabetes).
Lipid Profile (Total/HDL/LDL/TG) Classifier
Classifies total cholesterol, HDL, LDL and triglycerides per current Brazilian dyslipidemia guideline.
Framingham Cardiovascular Risk
Estimates 10-year cardiovascular event risk using the Framingham score (age, cholesterol, BP, smoking, diabetes).
eGFR (CKD-EPI 2021)
Computes estimated glomerular filtration rate via CKD-EPI 2021 formula (no race coefficient).
Sodium Corrected by Glucose
Corrects serum sodium in hyperglycemia (Hillier formula) — useful in decompensated diabetes.
Serum Osmolality & Osmolar Gap
Calculate serum osmolality and the osmolar gap from sodium, glucose and urea. A support tool for assessing fluid and electrolyte disorders.
Seed Germination Time by Temperature
Estimates seed germination days based on soil temperature in Celsius.
Organic Fertilizer per Pot
Estimates grams of organic fertilizer needed for a pot by liters.
Pot Substrate Liters
Estimates liters of substrate to fill a pot by its dimensions.
Plant Light in Lumens
Estimates lumens needed for a plant by type and area.
Orchid Bloom Months
Estimates months until orchid bloom by species.
Citrus Fruiting Years
Estimates years to full fruiting of citrus trees by species.
Mango Fruiting Years
Estimates years until mango tree fruits by variety.
Average Tree Leaves
Estimates number of leaves on a medium tree by species.
Tropical Tree Height by Years
Estimates the height of a tropical tree in meters by age in years.
Citrus Prunings per Year
Estimates ideal number of yearly prunings for citrus by species.
Irrigation by Rainfall
Computes complementary irrigation mm based on observed rainfall.
Tea Leaf Drying Time
Estimates hours to dry tea leaves by drying method.
Garden Plants Coverage
Computes number of seedlings to cover a garden by spacing.
Honey per Hive Flowering
Estimates kg of honey per hive by flowering intensity.
Wax per Hive Yearly
Estimates kg of wax produced per hive in a year.
Propolis per Hive Monthly
Estimates grams of propolis per hive per month.
Bees per Hive with Queen
Estimates the number of bees per hive by colony stage.
Ant Venom in mg
Estimates ant venom dose in mg by species.
Termite Mounds per Hectare
Estimates termite mound density per hectare by biome.
Aedes Mosquitoes per Focus
Estimates the number of Aedes mosquitoes emerging per focus.
Cockroaches Kitchen Density
Estimates cockroach count in a kitchen by infestation level.
Ants per Anthill
Estimates ants per anthill by species (medium-size).
Butterflies in Flowering Garden
Estimates visiting butterflies in a flowering garden by area.
Dragonflies by Lake Area
Estimates dragonflies around a lake by water surface area.
Spiders in House
Estimates spiders inside a typical house by room count.
Housefly Lifespan Days
Estimates housefly lifespan by ambient temperature.
Survival Without Water
Estimates human survival in days without water by ambient temperature.
Survival Without Food
Estimates human survival days without food by body fat level.
Survival by Body Temperature
Estimates survival hours in hypothermia by core body temperature.
Camping Water Calculator
Calculate how many liters of water to bring per person per day on a camping trip, based on activity level and climate. Plan supplies for hikes and camp.
Hiking Food kg per Day
Estimates kg of food per day for hiking by intensity.
Fire Making Time
Estimates minutes to make fire with sticks given wind/humidity.
Firewood Night Bonfire
Estimates kg of firewood for a night bonfire by hours of use.
Lightning Distance by Thunder
Find out how far away lightning struck by counting the seconds between the flash and the thunder. Sound travels about 1 km every 3 seconds.
Forest Shelter Time
Estimates hours to build a forest survival shelter by type.
Compass Orientation Distance
Computes meters of drift between true and magnetic north for a given walk.
Fish Catch Time by Area
Estimates minutes to catch a fish by water-body type.
Forest Vine Water Time
Estimates minutes to gather 1 L of water from Amazon vines.
Elephant Lifespan
Shows elephant lifespan by species.