Compare the 401(k) and 403(b) workplace retirement calculators: monthly-compounded balance projection with match caps versus an annual model with salary growth, for private-sector and tax-exempt employers.
Freshness log
What's new
Recently refreshed calculators and newly published side-by-side comparisons, newest first. Everything here is derived from the live site — dates reflect the last edit on each page.
Recently updated calculators20 newest
- Shot Put Ideal-Flight Scenario Calculator
- 10/1 ARM Mortgage Calculator
- 30 Day Calculator
- 401(k) Calculator
- ABSI (A Body Shape Index) Calculator
- Age Calculator
- Age Difference Calculator
- Albumin Globulin Ratio Calculator
- Alcohol Units Calculator
- Allele Frequency Calculator
- Army Body Fat Calculator
- Audiobook Speed Calculator
- Average Percentage Calculator: Simple Mean of 2 to 5 Percentages
- Backpack Weight Calculator
- Bacteria Growth Calculator
- Baker's Percentage Calculator
- Basal Area Calculator
- Battery Charge Time Calculator
- BBQ Party Calculator
- Bicycle Gear Calculator
Newly added comparisons12 newest
Compare the 401(k) retirement projection and the 529 college savings calculator: a workplace balance projection with employer match versus an education-cost target with a monthly contribution requirement.
Compare workplace 401(k) plans with individual IRAs: employer match and salary deferrals versus individual contributions, deductions, and withdrawal tax.
Compare the two timed-distance aerobic capacity tests: the submaximal six-minute walk with sex-specific predicted distance and percent expected versus the maximal-effort 12-minute Cooper run/walk with a VO2max estimate and reference bands.
Compare the age calculator's exact calendar age for one person with the age difference calculator's gap between two people, ages, or birth years: birthday-aware arithmetic versus an absolute gap with approximate and precise methods.
Compare years, months, and days since a birth date with next-birthday countdown against the duration between any two dates with exact day counts.
Compare two blood-chemistry ratio calculators: the electrolyte anion gap with optional potassium and albumin correction versus the albumin-to-globulin protein ratio.
APR estimates the annual cost of borrowing, including fees. APY shows the annual yield on deposits after compounding. See what each measure includes and when to use which.
Compare two body-composition estimates: the Army circumference-method body fat percentage with age-band pass/fail versus the raw ABSI research shape index.
Compare planning a book by listening — recorded duration, playback speed, and breaks — with planning by reading — word count, words per minute, and content type.
Compare the average percentage calculator's equal-weight mean of percentages with the weighted average calculator's mean weighted by importance, credits, or sample size.
Compare two population-level biology calculators: exponential bacterial population growth over time from a per-hour rate versus Hardy-Weinberg allele and carrier frequencies from a recessive disease frequency.