diff --git a/bitcoin/src/blockdata/transaction.rs b/bitcoin/src/blockdata/transaction.rs
index 792906c5..5d3af10b 100644
--- a/bitcoin/src/blockdata/transaction.rs
+++ b/bitcoin/src/blockdata/transaction.rs
@@ -1277,6 +1277,58 @@ pub struct InputWeightPrediction {
 }
 
 impl InputWeightPrediction {
+    /// Input weight prediction corresponding to spending of P2WPKH output with the largest possible
+    /// DER-encoded signature.
+    ///
+    /// If the input in your transaction uses P2WPKH you can use this instead of
+    /// [`InputWeightPrediction::new`].
+    ///
+    /// This is useful when you **do not** use [signature grinding] and want to ensure you are not
+    /// under-paying. See [`ground_p2wpkh`](Self::ground_p2wpkh) if you do use signature grinding.
+    ///
+    /// [signature grinding]: https://bitcoin.stackexchange.com/questions/111660/what-is-signature-grinding
+    pub const P2WPKH_MAX: Self = InputWeightPrediction { script_size: 0, witness_size: 1 + 1 + 73 + 1 + 33 };
+
+    /// Input weight prediction corresponding to spending of taproot output using the key and
+    /// default sighash.
+    ///
+    /// If the input in your transaction uses Taproot key spend you can use this instead of
+    /// [`InputWeightPrediction::new`].
+    pub const P2TR_KEY_DEFAULT_SIGHASH: Self = InputWeightPrediction { script_size: 0, witness_size: 1 + 1 + 64 };
+
+    /// Input weight prediction corresponding to spending of taproot output using the key and
+    /// **non**-default sighash.
+    ///
+    /// If the input in your transaction uses Taproot key spend you can use this instead of
+    /// [`InputWeightPrediction::new`].
+    pub const P2TR_KEY_NON_DEFAULT_SIGHASH: Self = InputWeightPrediction { script_size: 0, witness_size: 1 + 1 + 65 };
+
+    /// Input weight prediction corresponding to spending of P2WPKH output using [signature
+    /// grinding].
+    ///
+    /// If the input in your transaction uses P2WPKH and you use signature grinding you can use this
+    /// instead of [`InputWeightPrediction::new`]. See [`P2WPKH_MAX`](Self::P2WPKH_MAX) if you don't
+    /// use signature grinding.
+    ///
+    /// Note: `bytes_to_grind` is usually `1` because of exponential cost of higher values.
+    ///
+    /// # Panics
+    ///
+    /// The funcion panics in const context and debug builds if `bytes_to_grind` is higher than 62.
+    ///
+    /// [signature grinding]: https://bitcoin.stackexchange.com/questions/111660/what-is-signature-grinding
+    pub const fn ground_p2wpkh(bytes_to_grind: usize) -> Self {
+        // Written to trigger const/debug panic for unreasonably high values.
+        let der_signature_size = 10 + (62 - bytes_to_grind);
+        let witness_size = 1 // length of element count varint
+            + 1 // length of element size varint (max signature length is 73B)
+            + der_signature_size
+            + 1 // sighash flag
+            + 1 // length of element size varint
+            + 33; // length of (always-compressed) public key
+        InputWeightPrediction { script_size: 0, witness_size }
+    }
+
     /// Computes the prediction for a single input.
     pub fn new<T>(input_script_len: usize, witness_element_lengths: T) -> Self
         where T :IntoIterator, T::Item:Borrow<usize>,