Tree Age Calculator

Calculate the detention time or hydraulic retention time for a tank or basin, crucial for water treatment processes.

Calculate the Needed Fire Flow (NFF) for a building, a critical calculation for fire protection engineering to ensure adequate water supply for firefighting.

Calculate the Hydraulic Retention Time (HRT), a key parameter in environmental engineering for designing reactors and settling tanks.

Calculate Mixed Liquor Volatile Suspended Solids in wastewater treatment.

Find the current moon phase or the phase for any given date. A great tool for astronomers, gardeners, and the curious.

Estimate the height of a tree using simple trigonometry. Measure the distance to the tree and the angle to its top to calculate its height.

Calculate the number of trees that can be planted per acre based on the desired spacing between trees and rows.

A conceptual tool to calculate the estimated material and cost for building a very large-scale wall, inspired by border wall discussions.

Estimate your self-employment taxes as a freelancer or independent contractor. Helps you plan for quarterly tax payments and avoid surprises.

Project the growth of your 401(k) retirement savings over time. See how contributions, employer match, and investment returns can impact your nest egg.

Project the future value of a 529 college savings plan. See how your contributions can grow over time to help fund educational expenses.

Quickly find the exact date that was 90 days before today or any other specified date. Useful for tracking deadlines and timelines.

Convert your A1c level to an Estimated Average Glucose (eAG) number. A vital tool for individuals with diabetes to understand their blood sugar control.

Calculate the Alcohol By Volume (ABV) of your homebrew beer, wine, or cider by providing the original and final gravity readings.

Convert between units of angular acceleration.

Convert between units of acceleration like m/s² and g-force.