--- title: "#calculators articles | Hashnode" description: "Explore 5 articles tagged #calculators on Hashnode. Tutorials, guides, and how-tos from the community." url: "https://hashnode.com/tag/calculators" --- Tag # #calculators 5 posts · 0 followers [Dr Diamond Sharma](https://hashnode.com/@drdiamond) · [Jul 25](https://hashnode.com/posts/how-a-pregnancy-wheel-works-gestational-age-calculator/6a64285aa0250cb0a75fc82a) ### [How a Pregnancy Wheel Works: Understanding Gestational Age & Due Date Calculations](https://zerowhisper.hashnode.dev/how-a-pregnancy-wheel-works-gestational-age-calculator?utm_source=hashnode&utm_medium=feed) Learn how pregnancy wheels calculate gestational age and due dates using Naegele's rule, plus explore modern digital obstetric calculators. 3 min read · [zerowhisper.hashnode.dev](https://zerowhisper.hashnode.dev/how-a-pregnancy-wheel-works-gestational-age-calculator?utm_source=hashnode&utm_medium=feed) [circuitrocks](https://hashnode.com/@circuitrocks) · [Jun 18](https://hashnode.com/posts/eight-free-maker-tools-just-launched-at-circuitrocks/6a3382a3c7a686da68122924) ### [Eight Free Maker Tools Just Launched at Circuit.Rocks](https://circuitrocks.hashnode.dev/eight-free-maker-tools-just-launched-at-circuitrocks?utm_source=hashnode&utm_medium=feed) Eight Free Maker Tools: Eight free maker calculators just landed at Circuit.Rocks: LED resistor, voltage divider, PCB trace width, logic-level checker… 3 min read · [circuitrocks.hashnode.dev](https://circuitrocks.hashnode.dev/eight-free-maker-tools-just-launched-at-circuitrocks?utm_source=hashnode&utm_medium=feed) [Evgenii Konkin](https://hashnode.com/@evgeniikonkin) · [May 3](https://hashnode.com/posts/why-one-ground-rod-often-fails-before-installation-even-starts/69f6f4f10ab374db9988369f) ### [Why One Ground Rod Often Fails Before Installation Even Starts](https://calcengineer.hashnode.dev/why-one-ground-rod-often-fails-before-installation-even-starts?utm_source=hashnode&utm_medium=feed) A practical engineering breakdown of the single-rod grounding formula, why standard rods often underperform, and how to spot trouble before installation. 5 min read · [calcengineer.hashnode.dev](https://calcengineer.hashnode.dev/why-one-ground-rod-often-fails-before-installation-even-starts?utm_source=hashnode&utm_medium=feed) [cannan David](https://hashnode.com/@CanaDavid) · [Sep 29, 2025](https://hashnode.com/posts/this-financial-calculator-site-adds-5-10-new-tools-every-week-currently-30-all-free/68daa33986353564f835de7b) ### [This Financial Calculator Site Adds 5-10 New Tools Every Week (Currently 30+, All Free)](https://techtoolsreview.hashnode.dev/this-financial-calculator-site-adds-5-10-new-tools-every-week-currently-30-all-free?utm_source=hashnode&utm_medium=feed) Discover SuperCalc's growing collection of 30+ free financial calculators with no ads. New tools added weekly including compound interest, retirement plan 2 min read · [techtoolsreview.hashnode.dev](https://techtoolsreview.hashnode.dev/this-financial-calculator-site-adds-5-10-new-tools-every-week-currently-30-all-free?utm_source=hashnode&utm_medium=feed)