Reference library65 entries

Tag: significant figures

Practical explanations, worked examples, and reference notes for reporting numbers correctly.

Jul 2026

Significant Figures in Titration Calculations: Precision and Rounding Guide

Master the rules of significant figures in titration calculations, including rounding conventions, uncertainty propagation, and standards compliance, with worked examples and common pitfalls.

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Jul 2026

Chemistry

Molar Mass: How Many Sig Figs Should You Use?

Learn the rules for determining significant figures in molar mass calculations, including conventions, standards, and common pitfalls.

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Jul 2026

Significant Figures

Significant Figures: The Definitive Guide for GCSE and A-Level Sciences

Master the rules, conventions, and standards of significant figures with this comprehensive reference, designed for GCSE, A-Level, and university science students.

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Jul 2026

Rounding Methods

Truncation vs Rounding: When Cutting Digits Is Correct

Truncation and rounding are distinct digit-reduction methods. Truncation simply cuts off excess digits, while rounding adjusts the retained digits based on the discarded portion.…

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Jul 2026

Error Propagation

Propagating Uncertainty Through Addition and Multiplication: Rules, Examples, and Standards

Learn how to propagate uncertainty when adding, subtracting, multiplying, and dividing measured values. Understand the significant figure rules, the GUM approach, and common pitfalls.

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Jul 2026

Significant Figures

Significant Figures in Multi-Step Calculations: When to Round

Learn the correct rounding strategy for multi-step calculations to preserve precision and avoid error propagation.

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Jul 2026

Significant Figures

Why 1200 Can Have 2, 3, or 4 Significant Figures

The number 1200 is ambiguous because trailing zeros without a decimal point are not significant. Depending on context, it can have 2, 3, or…

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Jul 2026

Double Rounding Error

The Double Rounding Error That Changes Your Final Answer

Double rounding—rounding an intermediate value and then rounding again—can produce a different final result than a single direct rounding. Learn the rules, standards, and…

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Jul 2026

Rounding vs Significant Figures

How to Round to Significant Figures in Excel (ROUND + LOG10 Method)

Learn the exact Excel formula to round any number to a specified number of significant figures using ROUND and LOG10, with worked examples, standards…

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Jul 2026

Chemistry

pH and Sig Figs: Why Only the Decimals Count

In pH measurements, only the digits after the decimal point are significant. This article explains the logarithmic basis, the rules, and common pitfalls.

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