Alligation Calculator

Calculate the activation energy of a reaction using the Arrhenius equation with rate constants at two different temperatures.

Estimate the activity coefficient of an ion in solution using the Debye-Hückel equation, which accounts for ionic interactions.

Determine the actual yield of a chemical reaction based on your experimental results and compare it to the theoretical yield.

Calculate the Air-Fuel Ratio (AFR) or Lambda value for combustion processes, essential for engine tuning.

Use the Arrhenius equation to calculate the rate constant, activation energy, or temperature of a chemical reaction.

Look up fundamental properties of any chemical element from the periodic table.

Calculate the atom economy of a chemical reaction to measure its efficiency and green chemistry principles.

Calculate the weighted average atomic mass of an element from its isotopes.

Quickly calculate the date that is 100 days from a starting date. Perfect for tracking 100-day challenges or project milestones.

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

Find the date that is 120 days from any given start date. Useful for planning timelines, loan terms, and long-term projects.

Calculate the date that is 180 days (about six months) from a specific start date. Ideal for setting semi-annual goals or deadlines.

A simple tool to find the date that is exactly 30 days from a given start date. Commonly used for trial periods and monthly planning.

Quickly add or subtract 30 minutes from any given time. A handy tool for scheduling meetings, breaks, or appointments.

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

Find the date that is 45 days from a specific start date. Useful for tracking mid-quarter deadlines and other short-term goals.