diff --git a/library/Text/Builder.hs b/library/Text/Builder.hs
--- a/library/Text/Builder.hs
+++ b/library/Text/Builder.hs
@@ -38,6 +38,8 @@
   -- ** Digits
   decimalDigit,
   hexadecimalDigit,
+  -- ** Real
+  fixedDouble,
   -- ** Time
   intervalInSeconds,
 )
@@ -317,3 +319,8 @@
     padFromLeft 2 '0' (decimal hours) <> ":" <>
     padFromLeft 2 '0' (decimal minutes) <> ":" <>
     padFromLeft 2 '0' (decimal seconds)
+
+{-| Double with a fixed number of decimal places. -}
+{-# INLINE fixedDouble #-}
+fixedDouble :: Int {-^ Amount of decimals after point. -} -> Double -> Builder
+fixedDouble decimalPlaces = fromString . printf ("%." ++ show decimalPlaces ++ "f")
diff --git a/text-builder.cabal b/text-builder.cabal
--- a/text-builder.cabal
+++ b/text-builder.cabal
@@ -1,5 +1,5 @@
 name: text-builder
-version: 0.6.2
+version: 0.6.3
 category: Text
 synopsis: An efficient strict text builder
 homepage: https://github.com/nikita-volkov/text-builder