Nature
Sunrise/sunset, gardening area, carbon footprint, and weather.
31 calculators in Nature
Weather
Air Quality Index Calculator
Calculate and interpret air quality index levels.
Dew Point Calculator
Calculate dew point from temperature and humidity.
Earthquake Magnitude Calculator
Compare earthquake magnitudes and energy released.
Heat Index Calculator
Calculate apparent temperature from humidity and temperature.
Snow Load Calculator
Calculate snow load on roofs and structures.
Sunrise Sunset Calculator
Find sunrise and sunset times for any location and date.
UV Index Calculator
Calculate UV index exposure risk and safe sun time.
Wind Chill Calculator
Calculate wind chill factor from temperature and wind speed.
Gardening
Beekeeping ROI Calculator
Calculate honey and beeswax revenue, costs, and break-even timeline for your apiary.
Chicken Coop ROI Calculator
Estimate egg production, savings, and break-even timeline for backyard chickens.
Compost Calculator
Calculate the right green-to-brown ratio for composting.
Growing Degree Days Calculator
Calculate accumulated growing degree days (GDD) and estimate crop maturity timelines.
Frost Date Calculator
Estimate your last spring frost and first fall frost dates by USDA hardiness zone or latitude. Plan your planting season with confidence.
Garden Bed Calculator
Calculate soil and mulch needed for garden beds.
Garden Water Calculator
Estimate weekly and monthly irrigation needs based on plant type, garden area, rainfall, and soil drainage.
Garden Yield vs Grocery Cost
Estimate your garden's harvest and compare it to grocery store prices to see net savings and ROI.
Lawn Area Calculator
Calculate lawn area and seed or fertilizer needed.
Plant Spacing Calculator
Calculate how many plants fit in your garden area based on spacing and planting pattern.
Planting Zone Calculator
Find your USDA plant hardiness zone based on minimum temperature and get planting recommendations.
Soil Volume Calculator
Calculate soil volume needed for raised beds and pots.
Tree Age Estimator
Estimate a tree's age from trunk circumference and species growth factor.
Astronomy
Energy
Inverter Loss Calculator
Estimate power loss in DC-to-AC conversion and the annual cost of inverter inefficiency.
Solar Battery Size Calculator
Estimate the battery storage capacity needed for your off-grid or backup solar power system.
Solar Panel Calculator
Estimate solar panel system output, savings, and payback period for your home.
Wind Turbine Calculator
Estimate wind turbine power output and annual energy generation based on wind speed, rotor size, and efficiency.
Other
Carbon Footprint Calculator
Estimate your annual carbon footprint from transportation, home energy, and diet.
Carbon Sequestration Calculator
Estimate how much CO2 your trees absorb based on tree type, age, and number of years.
Rainwater Harvest Calculator
Calculate how much rainwater you can collect from your roof.