Calculators— Guides & Articles

• Can an M/M/1 Queue Calculator Model Several Servers

  Published 2026-08-14

  An M/M/1 queue calculator cannot model several servers — that requires M/M/c. Learn what the single-server M/M/1 model does and its limits.

  

• How to Calculate Pythagoras Theorem in Excel: Formulas

  Published 2026-08-14

  Calculate Pythagoras theorem in Excel using =SQRT(A2^2+B2^2) for the hypotenuse, or swap for a missing leg. Pair it with a browser tool.

  

• How to Change Pixels to CM in Canva Step by Step

  Published 2026-08-14

  Need to switch pixel dimensions to centimetres for a Canva project? Use the Pixels to CM Converter to set the right size for print or web at any DPI.

  

• How to Calculate Developer Breakeven Price Step by Step

  Published 2026-08-14

  Calculate a developer's breakeven price from total cost, units sold, and platform fee, then verify the fixed-point and mask math with the Programmer Calculator.

  

• How to Find Prime Numbers Up to Any Limit

  Published 2026-08-14

  List every prime up to N or the first N primes with a free browser-based Sieve of Eratosthenes. Count, sum and largest prime included.

  

• How to Determine Prime Factorization of Any Number

  Published 2026-08-14

  Determine prime factorization by hand or instantly with our free calculator. Factor any integer up to one trillion, with exponent form and factor tree.

  

• Design Pressure vs Test Pressure: Convert Units Right

  Published 2026-08-14

  Design pressure vs test pressure: what each term means, why test pressure is higher, and how to convert values between bar, psi, kPa and other units.

  

• How to Calculate Your Pregnancy Due Date

  Published 2026-08-14

  Estimate your due date with Naegele's rule — add 280 days to your last period, adjust for your cycle length, and read EDD and gestational age instantly.

  

• How to Calculate PPI and DPI: What Bonds the Terms

  Published 2026-08-14

  Calculate PPI and DPI from any screen's resolution and diagonal size. See the formula, the bond between the two terms, and a step-by-step method.

  

• 3D Bin Packing Calculator: When Scalar Packing Helps

  Published 2026-08-13

  3D bin packing calculator: see when a scalar First Fit Decreasing model fits your problem, how to run it on this site, and the limits of 1D packing.