Fidamen

Convert GBP to USD – Currency Converter

Convert British pounds (GBP) to United States dollars (USD) instantly. Values are calculated using the current mid‑market exchange rate (USD per GBP) and shown with consumer-friendly rounding while preserving higher internal precision for accuracy.

This tool provides an indicative conversion for planning and comparison. It does not include bank or card spreads, outbound or inbound transfer fees, or local tax withholdings. For an executed trade or payment, check the final rate and charges with your service provider.

Updated Nov 13, 2025QA PASS — golden 25 / edge 120Run golden-edge-2026-01-23

Governance

Record 3db6b642e5a8 • Reviewed by Fidamen Standards Committee

Interactive Converter

Convert between british pound and us dollar with precision rounding.

Quick reference table

British PoundUS Dollar
£1.00$1.27
£5.00$6.35
£10.00$12.70
£25.00$31.75
£50.00$63.50
£100.00$127.00

Methodology

We reference ISO 4217 currency codes and standard financial reporting practices when representing currency pairs. Rates displayed are mid‑market quotes (the midpoint between buy and sell prices) aggregated from liquidity sources and refreshed regularly to reflect current market conditions.

Displayed results are computed by multiplying the input amount in GBP by the quoted USD/GBP rate. For presentation we round to two decimal places by default (typical for USD display) while retaining greater precision behind the scenes to reduce cumulative rounding error in chained calculations.

Worked examples

Example 1 — Mid‑market: 10.00 GBP × 1.25 USD/GBP = 12.50 USD (displayed).

Example 2 — Internal precision: 123.456 GBP × 1.246789 USD/GBP = 153.937259 USD → displays as 153.94 USD, internal value preserved at 153.937259 for downstream calculations.

F.A.Q.

Are the rates guaranteed?

No. Rates are indicative mid‑market quotes and are not a firm offer. Executable rates for bank transfers, cards, or cash withdrawals include provider spreads and fees which can change between quote and settlement.

Why is the rate different from my bank or card?

Banks and card networks apply a spread (markup) and may add fixed fees. They also use their own settlement windows and liquidity sources. Use this calculator for the mid‑market benchmark; contact your bank or payment provider for the exact executed rate and total fees.

How often are rates updated?

Rates are refreshed frequently to reflect live market prices. Update frequency may vary; for time‑sensitive or large transactions, request a firm rate from your provider before settling.

Does this include transfer fees or taxes?

No. Displayed conversions do not include transfer fees, receiving bank charges, intermediary correspondent bank fees, or taxes. Always factor in those costs when estimating the final received amount.

What rounding and precision are used?

Displayed USD values use two decimal places by default to match common currency display conventions. Internal arithmetic keeps higher precision (typically 6+ decimal places) to minimize rounding error for multi‑step calculations.

Which codes identify these currencies?

ISO 4217 defines currency codes: GBP for British pound sterling and USD for United States dollar. Reference ISO 4217 for canonical currency identifiers.

Which time standard is used for timestamps?

Timestamps use coordinated universal time (UTC). When comparing quotes or reconciling transactions, record the UTC timestamp and the provider’s settlement time zone to avoid confusion.

How can I get a firm exchange rate?

Contact your bank, foreign exchange broker, or payment provider for a firm quote. For large amounts, providers may require confirmation, KYC, or specific settlement instructions before locking a rate.

Sources & citations

Further resources

Versioning & Change Control

Audit record (versions, QA runs, reviewer sign-off, and evidence).

Record ID: 3db6b642e5a8

What changed (latest)

v1.0.0 • 2025-11-13 • MINOR

Initial publication and governance baseline.

Why: Published with reviewed formulas, unit definitions, and UX controls.

Public QA status

PASS — golden 25 + edge 120

Last run: 2026-01-23 • Run: golden-edge-2026-01-23

Engine

v1.0.0

Data

Baseline (no external datasets)

Content

v1.0.0

UI

v1.0.0

Governance

Last updated: Nov 13, 2025

Reviewed by: Fidamen Standards Committee (Review board)

Credentials: Internal QA

Risk level: low

Reviewer profile (entity)

Fidamen Standards Committee

Review board

Internal QA

Entity ID: https://fidamen.com/reviewers/fidamen-standards-committee#person

Semantic versioning

  • MAJOR: Calculation outputs can change for the same inputs (formula, rounding policy, assumptions).
  • MINOR: New features or fields that do not change existing outputs for the same inputs.
  • PATCH: Bug fixes, copy edits, or accessibility changes that do not change intended outputs except for previously incorrect cases.

Review protocol

  • Verify formulas and unit definitions against primary standards or datasets.
  • Run golden-case regression suite and edge-case suite.
  • Record reviewer sign-off with credentials and scope.
  • Document assumptions, limitations, and jurisdiction applicability.

Assumptions & limitations

  • Uses exact unit definitions from the Fidamen conversion library.
  • Internal calculations use double precision; display rounding follows the unit's configured decimal places.
  • Not a substitute for calibrated instruments in regulated contexts.
  • Jurisdiction-specific rules may require official guidance.

Change log

v1.0.0 • 2025-11-13 • MINOR

Initial publication and governance baseline.

Why: Published with reviewed formulas, unit definitions, and UX controls.

Areas: engine, content, ui • Reviewer: Fidamen Standards Committee • Entry ID: 5ef9c81441fc