Earth science and environment calculators

Use practical calculators for earthquakes, weather, water, and environmental engineering. All tools run in your browser.

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Browse by category

Disaster prevention (earthquake, tsunami, ground) Maps/Topography (Geodetic/Gradient/Curvature) Atmosphere/weather (sun/humidity/air quality) Water (rain, flow rate, water quality) Environmental engineering Earth's interior/age (geothermal/radioactivity) Soil/land area (erosion)

How to use this hub

Start with one real question. Pick one category button.

Open one calculator first. Check units and assumptions.

Then move to the next tool only if you need more detail.

Keep your location, date, and units the same across tools.

Use official data and local guidance for final decisions.

Simple start for first-time users

Pick one place on the map and one date first.

Write down your goal in plain words before you start.

Ask one small question at a time and keep the scope narrow.

Use one tool, read the result, then decide the next step.

Do not change many inputs at once in the first run.

Check units each time you copy values between tools.

Keep meters with meters, and keep feet with feet.

Keep local time with local time for all date calculations.

When you compare two cases, change only one input.

Save each run with a short note about what changed.

Use clear names like north-river-rain and west-hill-wind.

If a result looks odd, run the same case again.

Then run one known sample to make sure settings are right.

For hazard topics, treat outputs as rough guidance only.

Use local alerts, maps, and expert advice for real action.

For class use, keep the same setup for all students.

For team use, share links so all members see the same input.

Use short logs: place, date, unit set, and key output.

Review the log at the end and mark the best run.

If needed, export data and keep source links with it.

Small steps work best. Slow is fine. Clear is best.

One tool now. Next tool later. Keep your flow calm.

Check map, sky, rain, and wind before final plans.

Use the same base case when you teach this topic.

Short notes help you spot mistakes fast.

Good logs make team review much easier.

If two tools disagree, check units and time zones.

Then test one clean sample from the help text.

Keep only what you need for the next step.

Clear input leads to clear output.

Filter by keyword

earthquake tsunami AQI ppm m³/s liquefaction geothermal noise tide clear

Suggested workflows

Use these short paths when you are not sure where to begin.

Follow each row from left to right as a suggested learning route.

Disaster Preparedness (Earthquake, Tsunami, Ground)

Learning and estimation tools for earthquakes, tsunamis, and ground response.

Mapping and Terrain (Geodesy, Slope, Curvature)

Core map and terrain calculations, including geodesic distance and bearing, slope metrics, and horizon curvature.

Atmosphere and Weather (Sun, Humidity, Air Quality)

Practical atmospheric calculations for solar position, pressure-altitude conversion, humidity metrics, gas concentration, and AQI.

Water (Rainfall, Flow, Water Quality)

Tools for rainfall-to-runoff estimates, open-channel flow, nutrient load, and water-quality checks.

Environmental Engineering (Dispersion, Stack, Noise, CO2)

Environmental engineering estimators for plume dispersion, stack rise, noise, and electricity-related CO2 emissions.

Earth Interior and Age (Geothermal, Radioactivity)

Core calculations for geothermal gradient, heat flow, and radioactive decay dating.

Soil and Land (Erosion)

Simple erosion estimation based on USLE/RUSLE factors.

What is geology/environment?

Geology and environment is a field that uses numerical values to understand natural phenomena and people's lives, crossing fields such as earthquakes, tsunamis, topography, weather, water quality, and environmental engineering. In this hub, you can check calculations that can be used for learning, reports, and initial confirmation on-site in the flow of input → results → procedures.

*The tools in this guide are for learning estimates. Confirm design, safety, compliance, and reporting decisions with official standards and professional review.

Choose the earth-science page by the field task

Use this hub when the problem is environmental or geoscience, but you still need to choose the right calculator. The fastest route is to decide whether the job is hazard timing, air and water quality, terrain and runoff, or field conversions.

Where to go first

Before you compare outputs

Keep units, time basis, and observation conditions aligned. Most surprising differences come from changing those assumptions without noticing.

FAQ

Which tool should I start with?

The quickest way is to start with purpose-specific shortcuts. For example, you can follow the steps in the necessary order, such as "rainfall → flow rate → load → water quality."

Can the calculation results be used directly for practical decisions?

No. The calculations here are for educational and approximate purposes; in practice, professional judgment is required, including observation conditions, laws and regulations, and design standards.

What does the shared URL contain?

The shared URL includes input conditions and display settings. It is not intended to be used to input personal information.

When should I leave this hub for another science section?

Leave this hub when the task becomes chemistry-heavy lab work, astronomy planning, or pure physics formulas. Stay here when the context is environmental, geologic, or field-observation based.

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